History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined.

Martinair 495 crashes on a rain-soaked runway in Portugal, showing how weather can doom a landing. American 1572 hits a storm and loses both engines amid a tower shutdown. And crosswinds challenge an Air France crew already halfway down the runway.

Mike in north eastern Australia, going on and under the water, into labs and onto construction projects working with specialized teams as they tackle the daunting challenge of saving dying coral on the incredible Great Barrier R.

The crew of a commuter flight over France makes a sight-seeing detour that sets off a deadly chain of events.

After experiencing icing conditions, a turboprop slams into an Argentine desert; investigators are mystified by what they uncover.

Five aviation disasters and the changes they have forced air-traffic controllers to make.

On 13 January 1982, Air Florida Flight 90 stalls at 300 feet altitude, strikes a road bridge and crashes into the Potomac River, killing 78 people.

After touching down, a Taiwanese commuter plane is rocked by a massive explosion, but investigators find no evidence of a bomb on board.

A mechanical problem aboard an Air Canada plane turns into an all-out emergency six miles in the air.

A freight train carrying an excess of cargo loses its brakes while descending a mountain causing it to gain speed and derail into a neighborhood killing several people.

Costa Diadema's seven-day cruise around the Mediterranean offers Italian delights to its passengers and challenges to its captain and crew.

Japan's largest cruise ship brings East and West together on a cruise featuring cherry.

We hop aboard a seven-day cruise to the Canary Islands and Madeira aboard the first large liner to run purely on cleaner-burning liquefied natural gas.

Sailing from Chile and Peru to Ecuador and Costa Rica, the luxurious Seven Seas Explorer cruise ship is full of marble, granite and almost 500 chandeliers.

The Carnival Vista is the new flagship for one of the world's largest cruise lines, carrying more than 4,600 passengers and boasting 10 restaurants, nearly 2,000 staterooms and a crew of 1,400.

Azamara Journey travels the rivers of Southeast Asia, delivering passengers to exotic cities and hidden treasures that larger cruise ships cannot reach.

A trip aboard one of the world's most expensive and sought-after train rides details the journey for both passengers and crew.

VIA Rail's passenger train travels between Vancouver and Toronto on four-day, four-night journey that cater to everyone.

Travel aboard the colourful trains of the State Railway of Thailand and explore the famed Death Railway; the trains travel through ancient areas, historic tunnels, and raging rivers.

The Norwegian Breakaway cruise ship sets sail on her first voyage, and her captain faces a tough decision when a North Atlantic tempest forms.

Follow the building of the Norwegian Breakaway at Germany's Meyer-Werft shipyard; it is the largest ship they've ever built and they have only 18 months to finish it.

Le Boreal is built to take on the demanding waters of the Southern Ocean.

Take a cruise where the guests choose the ports to visit and the captain and crew work overtime to make it happen.

The world's latest, most-advanced expedition cruise ship Roald Amundsen whisks passengers on an adventurous voyage to Antarctica.

The ORBIS McDonnell Douglas DC-10, the world's only flying eye-hospital, includes an operating room and a classroom.

South Africa's most luxurious train - Rovos Rail - travel from Pretoria to Cape Town in classic cars pulled by a series of steam, diesel and electric locomotives.

The Sky Princess carries passengers from Fort Lauderdale, Florida, to three Central American stops.

The new Viking Sea cruise ship whisks guests away on a journey across the Arctic Circle and into the heart of Norway.

The highly-specialized North Rail Express container train travels from Narvik to Oslo, delivering cargo of fish as quickly as possible.

The prairies of Canada; the deserts of Australia; the cold of the Norwegian Arctic Circle; the steepest slopes of the mighty Swiss Alps.

Visit Stonehenge, kiss the Blarney Stone and hunt for Nessie on a magical tour of the British Isles, aboard Marina.

Facing Australia's fierce heat, Celebrity Solstice provides guests with views of waterfalls, jumping crocodiles, koalas and the Great Barrier Reef.

The Paul Gauguin offers five-star luxury while sailing near the coral reefs, mountainous islands and tropical playgrounds of French Polynesia.

New luxury liner Le Soleal navigates the uncharted waters of Indonesia to give her passengers one-of-a-kind encounters at exotic destinations.

On 4 November 2010, shortly after takeoff from Singapore, the number-two engine on Qantas Flight 32 partially disintegrates, causing serious damage to its left wing.

A British Airways flight to Australia in 1982 crashes into the Indian Ocean.

A design fault leads to an explosion on a DC-10 and two years later the same design fault causes another tragedy.

Air France Flight 296 fails to regain altitude after performing a fly-by during an air show at Mulhouse-Habsheim Airport.

A bomb explodes on Air India Flight 182 en route from Canada to India causing it to disintegrate over the coast of Ireland.

United Airlines Flight 718 and Trans World Airlines Flight 2 collide midair over the Grand Canyon in Arizona, killing all 128 people on both aircraft in 1956.

Polish Air Force Flight 101, carrying the President of Poland Lech Kaczynski, his wife Maria Kaczynska and other top officials, crashes in a wooded area while on final approach to Smolensk North Airport in heavy fog and low visibility.

Exploring the design and engineering stories behind D.C.'s Museum of African American History, the Montreal Tower and the Equinor building in Oslo.

Traveling from Canada to Belgium to the Southern U.S. to examine an eye-popping school, museum and railway station and reveal how they were built.

Uncovering the design and engineering secrets behind the Grand Canyon Skywalk, the Audain Museum and more.

Architects and engineers build an eco-friendly convention center on Vancouver's waterfront, a lift bridge in Bordeaux and a cocoon-shaped skyscraper in Tokyo each with unique challenges like marine habitats and massive spans.

A new performance center with a tent-like glass-and-steel lobby tests engineers in Kansas City; two twisting apartment towers make heads spin in Ontario.

Visiting London's Gherkin, Seattle's Evergreen Point Floating Bridge and Lyon's Musée des Confluences to uncover how and why they were built.

The engineering secrets behind the world's steepest mountain railway, a remodeled 145-year-old museum and a futuristic condo.

Mike in north eastern Australia, going on and under the water, into labs and onto construction projects working with specialized teams as they tackle the daunting challenge of saving dying coral on the incredible Great Barrier R.

A ride through Eastern Europe aboard heavy-hauling trains shows the logistical and mechanical challenges of making a multimillion-dollar cargo delivery.

Mike joins the U.S. Marines' Heavy Haulers helicopter squadron and gets inside their battle to keep a fleet of souped-up Sikorsky CH-53E Super Stallion choppers flying as they prepare for intense war games in the desert and mountains.

Mike in north eastern Australia, going on and under the water, into labs and onto construction projects working with specialized teams as they tackle the daunting challenge of saving dying coral on the incredible Great Barrier R.

Martinair 495 crashes on a rain-soaked runway in Portugal, showing how weather can doom a landing. American 1572 hits a storm and loses both engines amid a tower shutdown. And crosswinds challenge an Air France crew already halfway down the runway.

A new investigation sheds light on the controversial 1961 plane crash that killed U.N. Secretary-General Dag Hammarskjöld.

Leading aviation experts are confronted with a shocking theory as they investigate one of the greatest aviation mysteries of all time.

When an African airliner mysteriously crashes, Namibian investigators have to rule out a host of possible causes before reaching a conclusion.

A Northwest Airlines flight cruises above the Bering Sea before problems develop and pilots must make an emergency landing in Anchorage.

An air traffic controller's mistake causes a Boeing 737 to land on a runway already occupied by another aircraft.

A look at the most famous wooden warships over the course of 500 years.

The ships that made mighty empires, from the lone wolves that patrolled the high seas for imperial Britain to the USS Laffey's heroic WWII battle against kamikazes at Okinawa.

The evolution of amphibious assault vehicles, including the restoration of Britain's last surviving LCT 7074 landing craft, designed to carry six Churchill tanks.

A look at some of the rescue ships of the past 200 years of wartime and the brave men and women who risked their lives to save others.

A look at experimental ships and revolutionary designers that have changed the tide of war through the centuries.

A look at how technological advances over the centuries have transformed maritime warfare.

A retelling of the D-Day invasion and its critical naval operation involving an armada of diverse and ingenious vessels.

A look at how the role of battleships changed over the course of the First and Second World Wars.

Stories of espionage at sea, including deadly U-boat cat-and-mouse games during WWI, the sinking of the Lusitania, a gun-smuggling private yacht that made history, and liners turned troopships.

The legendary Battle of Trafalgar in 1805, which pitted Napoleon's French ships against a British armada under the command of Admiral Horatio Nelson.

A comprehensive look at the naval battle of Guadalcanal in November 1942 and the heroic efforts of U.S. sailors who held off powerful Imperial Navy.

A look at how maritime task forces and the Coast Guard are keeping commercial vessels and US shores safe from pirates and drug smugglers.

The Boeing B-17 Flying Fortress is one of the most lethal bombers of the U.S. Air Force in WWII's European and Pacific campaigns; among other things, the plane delivered food to the German-occupied Netherlands.

The history of the mean and ugly jet aircraft, the A-10 Warthog.

A look at how the C-47 evolved from passenger plane to a transport aircraft and flying hospital in WWII and years later as a gunship in Vietnam.

The fighter plane that helped turn the tide of World War II; the P-51 Mustang.

The massive AC-130 provides unparalleled close air support to U.S. and allied ground troops.

The inside story of how the AH/MH-6 evolved over the decades to become an irreplacable aircraft for the U.S. Military.

The inside story of Britain's flagship super jet of the Cold War era, the Hawker Hunter, and its most thrilling flights during the late 20th century.

During the Vietnam War, the United States needed a helicopter that could defend itself; the AH-1 Cobra, the world's first pure attack helicopter.

Electronic warfare aircraft; the EA-6B Prowler; the EA-18G Growler.

The history of the longest serving bomber in the U.S. military: the B-52 Stratofortress.

The 50-year evolution of the Army's top transport helicopter, the CH-47 Chinook.

Exploring the world's top close air support aircraft, which enter battles at a minute's notice.

Zoom above, and below, some of the Golden State's greatest monuments.

An aerial tour of the world's first national park showcases Yellowstone's diverse wildlife and rich history.

An aerial tour of Kansas shows a state with varied landscapes, scenic areas and historical conflict sites.

An aerial exploration of Wyoming reveals the Cowboy State's controversial history while highlighting its breathtaking canyons and volcanic formations.

A coast-to-coast aerial journey across America, visiting locations made famous by movies such as Rocky, Citizen Kane, Forrest Gump and others.

An aerial tour of New York City, spanning the city's five boroughs, capturing man-made and natural wonders; revealing the ways its citizens live, work and play.

Explore the forests, shores, bridges and tunnels of one of American's 13 original states, New Jersey.

A high-flying tour of Pennsylvania.

An aerial tour of Florida's peninsula and panhandle celebrates the state's sights, unique history and lavish lifestyles.

Great mountain ranges; coal-based economy.

Louisiana's wetlands and underwater oil fields.

A flight over Arizona explores the state's storied past, architectural achievements and landscapes, including America's natural wonder, the Grand Canyon.

A flight over Northern California explores ancient forests, timeless coasts, golden cities and the region's pioneering spirit.

A flight over North and South Dakota reveals the shared history and the vast differences of these sibling states.

A soaring tour over Washington, D.C. explores the unique landscape, rich history and colorful story of the Nation's Capital.

An aerial tour of Nevada; the state's deserts, ghost towns, neon cities and Hoover Dam; its history built on epic booms and busts.

A cross-country flight across America reveals the nation's most iconic industries, the people behind them and the stories of how they came to be.

The world's largest volcanic island; Iceland's landscapes, forged by fire and ice; a tour over Alaska, the residents it attracts and the wildlife that thrives in these unique surroundings.

The Lone Star's rugged canyons, historic ranches and modern cities.

Northern state's green forests; red-painted barns and sugar maples.

A cross-country flight over icy landscapes in Alaska's Denali, vast wetlands in Florida's Everglades, and over 100 million acres of badlands, deserts, and mountains.

A coast-to-coast tour over America's man-made structures, old and new; the Statue of Liberty and the Golden Gate Bridge.

A cross-country flight over the nation's mountains, beaches and national parks; visiting other sites that attract adventurers and tourists.

Natural wonders, manmade marvels, hidden treasures and places of inspiration.

A flight over Indiana explores the Hoosier State's rich agriculture, busy highways and basketball legends; exploring the War Memorial and the Angel Mounds of the southwest.

An aerial view of major cities in the United States, including Los Angeles, Miami, Chicago and Boston.

An aerial tour over Dallas and Fort Worth highlights the cities' differences while showcasing their shared contributions to the Texas narrative.

Mississippi from above; the state's unique beauty and history; mighty waters, ancient trails and the birth of the Delta Blues.

A soaring tour over Southern California explores the stunning beaches, vast deserts, sprawling city and unique culture.

A coast-to-coast tour over America's man-made structures, old and new; the Statue of Liberty and the Golden Gate Bridge.

A sky-high tour over Iowa explores its vast stretches of farmland, covered bridges and evolution from wilderness to statehood.

An aerial journey across Montana celebrates the Treasure State's adventure-filled history while showcasing its sprawling farms and rugged terrain.

A sky-high tour over Minnesota reveals the state's ancient, glacial landscapes and tells the stories of the pioneers who helped build the nation.

Viewing Oklahoma from the sky reveals a state filled with tall-grass prairies and man-made wonders; the Dust Bowl, Tornado Alley and buffalo-filled plains; it also shows a history steeped in tragedy and devastation.

An aerial journey over Ohio showcases the Buckeye State's autumnal vistas, majestic rivers, epic skyscrapers and battlegrounds.

A high-flying tour over Illinois; the Windy City, prairies and rivers; the state's dramatic history of great fires, crime and historic battles; Chicago's unique skyscrapers and the Lincoln Tomb.

Alpine valleys; Rocky Mountains; Denver's towering skyscrapers.

Soaring above the Cornhusker State's vast farms, towering spires, desolate badlands and gleaming cities.

Tour the Wisconsin State Capitol and Milwaukee City Hall, once the tallest building in the world.

The stories and sights of Hawaii's major islands.

A tour over two U.S. territories, Puerto Rico and the U.S. Virgin Islands.

A flying tour of Michigan's cultural landmarks, including Motown, the Great Lakes, the automobile industry and more.

A journey over America's western landscape featuring.

The South's famous landmarks, historical milestones and unique culture.

A coast-to-coast aerial tour celebrates the best small towns in the United States and tells stories about the men and women who called them home.

A sweeping tour over popular destinations in America, including the Badlands, Nantucket, the National Mall and more.

One of the most beautiful states on the Atlantic Coast.

Taking an aerial tour of Virginia.

Oregon's Cascade Mountains; Columbia River waterway.

An aerial view of Arkansas, where settlers' westward journeys began and the scene of Bonnie and Clyde's most serious crime; a view of the land of raging rivers, vast wilderness and legends of the Wild West.

An amazing aerial tour over Utah reveals a state full of otherworldly landscapes and landmarks, including a history steeped in Mormonism, pioneering tragedy, and Olympic glory.

An aerial view of New Mexico; exploring its landscapes and landmarks, while revealing its many legends and secrets.

A cross-country aerial journey over America's most majestic and unique roadside attractions.

An aerial tour over New England captures its beauty while celebrating its rich history; from the Massachusetts harbours, where Americans rebelled against the British, to the autumn colours that blanket the mountains of Vermont.

Home to some of America's highest mountains; Mount St. Helens.

A flight over Missouri explores the Show Me State's towering monuments, mighty rivers and spectacular Ozarks.

The birthplace of the Star Spangled Banner; sites Harriet Tubman, Babe Ruth and the DuPont family made their marks on history.

America's most remarkable natural wonders are explored including the Grand Canyon, the Great Lakes and more.

A view of Idaho from the air reveals a state filled with agricultural fields, lands untouched by human hands, and riches in the form of gold, ski resorts and spuds.

An aerial tour over Kentucky reveals a state of racetracks, country music highways, bourbon distilleries and a history of feuds and traditions.

A billion-dollar Stealth Bomber crashes at a U.S. Air Force base-the costliest aviation disaster ever. Bad data misleads a charter flight into a Portuguese mountain, and conflicting alarms send a cutting-edge jetliner plunging into the Atlantic.

Martinair 495 crashes on a rain-soaked runway in Portugal, showing how weather can doom a landing; American 1572 hits a storm and loses both engines amid a tower shutdown; crosswinds challenge an Air France crew already halfway down the runway.

Investigators hunt for answers when the pilots of three aircraft skip protocols, ignore their training and crash.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Investigators hunt for answers when the pilots of three aircraft skip protocols, ignore their training and crash.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Investigators hunt for answers when the pilots of three aircraft skip protocols, ignore their training and crash.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined.

Three planes fatally out of balance force investigators to question every calculation; it's a flight risk that's entirely preventable, and yet repeated disasters reconfirm the need for critical backup systems.

The crash of a commuter flight to Detroit leads investigators to a cause the industry has known about for years.

Atlantic Airways Flight 670 careened off the runway and became engulfed in flames.

If pilots aren't prepared when the runway is in sight, a landing can quickly become a tragedy.

Flydubai Flight 981 enters a rapid descent and crashes nose-first at Rostov-on-Don Airport in Rostov-on-Don, Russia, after aborting its second landing attempt in poor weather conditions.

Devastating failures in the air put pilots to the test and shine a light on three feats of flying.

Moments before Pacific Southwest Flight 1771 crashes on a cattle ranch in California, gunshots are heard in the cabin.

When a twin-engine jet careens off the runway in Kentucky, investigators must determine why the plane failed to take off.

A bomb explodes on Pan Am Flight 103, causing the aircraft to disintegrate in mid-air and the wreckage of the aircraft to crash into the Scottish town of Lockerbie, killing all 259 people on board and 11 people on the ground.

On 26 May 1991, the thrust reverser on the number one engine of Lauda Air Flight 004 deploys in flight without being commanded, causing the aircraft to spiral out of control, disintegrate, and crash about 100 miles northwest of Bangkok.

In a rush to complete their flights, three different flight crews skip key procedures, ignore signs of danger and make deadly decisions.

Mistaken identity and hostile fire over enemy territory are among the many risks that pilots face in war zones around the world.

From corrosion and metal fatigue to faulty repairs, three doomed airlines are brought down by gradually deteriorating parts.

A look at the fate of United Airlines Flight 232 which crashed into Sioux City's runway in 1989; it caused a subsequent explosion that left 111 people dead.

Pilots are prepared to cope with a range of emergency scenarios, but failures in training can lead to catastrophe in the cockpit.

With hidden flaws buried in their navigation systems, three planes suffer catastrophic computer errors that force investigators to dig deep for clues.

Facing a cascade of failures and a fire on board, a turboprop is just seconds from landing when it flips over and crashes.

The investigation into the 2014 crash of a TransAsia flight uncovers a systemic problem with the airline.

Investigators hunt for answers when the pilots of three aircraft skip protocols, ignore their training and crash.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Three last-resort water landings, all handled differently yet each one crucial to improving the outcomes of ditching on open water.

A quick trip from Washington D.C. to Ohio in 1994 turns deadly when pilots of a twin-engine turboprop attempt a risky landing.

The pairing of a domineering pilot and an inexperienced first officer has deadly consequences in northern Minnesota.

When an A300 stalls and crashes just before landing in Japan, fears arise about the plane's complex automated systems.

Three flights end in tragedy after miscommunication mix-ups and personality clases; Investigators try to unravel what went wrong.

A helicopter carrying offshore drilling workers crashes into the ocean, leading to an investigation that reveals a fatal flaw in the chopper's design.

A cleaning crew makes a careless error while cleaning a Boeing 757, affecting the plane's computer system and causing it to crash into the Pacific Ocean.

Experience romance on a mega cruiser that pampers its guests with the best of Italian design and American convenience.

Set a course for breathtaking sights on Koningsdam's 15-day voyage from Amsterdam to the northern tip of Norway.

Cruise among the icebergs of Greenland and the Canadian High Arctic aboard the expedition cruiser Ocean Endeavour.

This 50-year-old ocean liner offers off-season Baltic tours, battling unpredictable weather to deliver one-of-a-kind experiences.

Follow mega cruiser Regal Princess as she whisks guests to Germany, Russia, and Scandinavia in style.

A crew of 2,200 on the Symphony of the Seas tends to more than 5,500 passengers as they sail to ports in Spain, France and Italy.

Hector Rail's trains haul timber to a pulp mill in Ostrand, Sweden on some of the most difficult railways in the country.

Two magnificent journeys with New Zealand's KiwiRail: the TranzAlpine, a five-hour journey across 223 kilometers, and Northern Explorer, an 11-hour trip through five unique regions of the North Island.

Passengers on Ecuador's Tren Crucero experience a dangerous rail journey, which includes tropical jungles, volcanoes and the Devil's Nose.

The Norwegian Epic is a billion-dollar showboat with more than 20 bars and restaurants and pool decks that transform into nightclubs.

Filled with big toys, guests fly the trapeze, surf and skydive without ever leaving the world's most innovative cruise ship.

The world's top cruise ship, the Crystal Serenity visits Sydney harbor, the port of Melbourne, Bali, a large-scale furniture load in Semarang, Indonesia and the port of Singapore.

One of Holland America Line's largest cruisers makes its debut in the Caribbean, highlighted by a visit to an exclusive private island resort.

Take a river tour through some of Europe's greatest cities--Budapest, Vienna, and Amsterdam--on Viking Longship Gefjon.

The world's first double-decker passenger aircraft, the Airbus A380 has a groundbreaking design.

The Rocky Mountaineer travels across western Canada and over the Rocky Mountains.

We follow passengers and crew aboard Viking Star during its two-week tour from Barcelona to its home port in Bergen, Norway.

The only cruise ship designed specifically to navigate the treasures and dangers at the southern tip of South America.

A trip aboard the luxury tourist train, Transcantábrico Clásico through Northern Spain along a historic 19th century rail line.

Travelling up the coast of New Zealand in style aboard the Coastal Pacific, a train that embodies the nation's spirit of grit and determination; for two years, this ride was shut down due to an earthquake in 2016.

Royal Clipper is the largest sailing cruise ship in the world, celebrating tall ships of the 19th century while offering modern-day service for its guests.

Norwegian Joy sails amid icebergs in Alaska's Inside Passage, treating guests to glaciers, humpback whales, and the largest zip line in the world.

Costa Diadema's seven-day cruise around the Mediterranean offers Italian delights to its passengers and challenges to its captain and crew.

Japan's largest cruise ship brings East and West together on a cruise featuring cherry.

When a USAF stealth bomber crashes after takeoff, investigators search for a reason.

On August 22nd, 1985, 55 people died aboard British Airtours flight 28M when its engine catches fire as it accelerates.

Investigators struggle to understand the unusual flight path and Himalayan crash site of Thai Airways Flight 311.

On 1 June 2009, Air France Flight 447 stalls and crashes into the Atlantic Ocean while flying through a thunderstorm, killing all 228 people on board.

The captain of a Navy cruiser must quickly determine if an approaching plane is friendly.

A helicopter carrying oil workers to an offshore drilling platform crashes.

The two-man crew of a UPS cargo jet must attempt an emergency landing when a fire in the cargo hold fills their cockpit with smoke.

Visiting the Vancouver House, Norway's Under restaurant and the Seattle Central Library to discover how these visionary buildings were created.

Traveling to New York, Denver and Nice, France to visit Little Island, the Denver Museum of Art and La Tête Carrée; the secrets to how they were built is revealed.

The inside stories behind a new, horseshoe-shaped complex in Rotterdam, a rock-shaped opera house in China and a makeover of the British Museum.

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge.

A dazzling new 1400 foot tapering skyscraper is built right next to New York's Grand Central. A curving wine museum requires ingenious engineering in Bordeaux, France. And possibly the world's most glamorous parking garage.

A Manhattan high-rise; an Athens cultural center; a Singapore university.

A new Olympic and Paralympic museum tests engineers with its trailblazing accessible design. A dazzling curved glass skyscraper battles gravity in Milan. And a student center built under a noisy railroad.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Diving into retrofits on the world's only underwater habitat, where NASA astronauts train for space missions; Mike joins a crack repair team who breathe new life into this oceanic environment after a global pandemic shut it down.

Following a million-dollar freight run across four European countries and meeting the drivers, engineers and maintenance teams who keep the train running.

Mike joins crews as they build the world's longest railway tunnel in the Alps, fixing gridlock through the infamous Brenner Pass by drilling, blasting and digging their way through the mountains.

Investigators hunt for answers when the pilots of three aircraft skip protocols, ignore their training and crash.

After taking off from Taiwan, a China Airlines 747 suddenly disappears from radar and crashes, killing 225 people.

A 747's cargo door opens at 23,000 feet, causing an explosive decompression that ejects nine passengers from the plane.

In 1991, a Boeing 737 operating as United Airlines Flight 585 suddenly rolls into a dive and crashes within eight seconds, killing all 25 people on board.

History's most terrifying air disasters, and the investigations that followed, are revisited and reexamined.

When Germanwings Flight 9525 crashes in the French Alps, investigators discover shocking truths about the co-pilot's mental health.