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A huge winter storm slams into Toronto International Airport. The Airfield Inspector unit urgently tracks down a blown-over sign before it becomes a hazard. (4 of 10) 7+.

Mistaken identity and hostile fire over enemy territory are among the many risks that pilots face in war zones around the world. (S5, ep 1) 7+.

As they enter the second and most challenging phase of dogfighting, everything is on the line for our students. (S1, ep 5) 7+.

As US forces spread across the Pacific, Japan threw suicide bombers into action, built the world's biggest battleship and started building deep beneath Okinawa. 7+.

Colourised footage and eyewitness accounts show the price paid by troops and civilians to liberate Belgium and the Netherlands from Nazi rule. (2 of.

Clues point to a mechanical problem when a Continental Airlines flight crashes. But then, investigators find the true culprit in the Rocky Mountains.

A series of discoveries spark calls to transform Russia's entire aviation system when an Aeroflot Nord flight crashed onto the Trans-Siberian railway.

A US Parachute Infantry Regiment protects a critical bridge from a Nazi battle group during the opening days of the Battle of the Bulge. (S3, ep 5) 7+.

As the water drains away, a secret emerges beneath Manhattan's skyline, along with an astonishing feat of engineering and a casualty of World War I. RATING: AA.

When this UK power station reached the end of the road, it took all the power with it. Plus, explore landslides, tyres and inevitable human error. (S1, ep 6) 7+.

A countdown of the moments directly before and after hijackers flew an AA flight into the Pentagon. Fire engulfed the iconic structure and 184 died in the carnage. 7+.

Sriwijaya Air Flight 182 crashed into the Java Sea after a hard left bank, revealing deadly defects in the investigation that followed. (S24, ep 2 of 10) 7+.

Babe Flute, Casino Shoe, Cursed Amethyst: Is a beautiful gemstone in London's Natural History Museum really cursed and what do the strange symbols on its setting mean? (S3, ep 7) +.

Who were the apostles and how did they spread Jesus's teachings worldwide? Here, take a look at the birth of Christianity through the eyes of 12 remarkable men. 7+.

To solve ancient mysteries, explorer Albert Lin will use satellite and drones to look beneath the earth's surface and reveal secrets that have been buried for thousands of years. 7+.

A shocking look at the mysterious crash of Arrow Air Flight 1285, which killed 248 returning American soldiers when it dropped from the sky in 1985. 7+.