Air India Flight 182 explodes in mid-air and disintegrates over the coast of Ireland, killing all 329 on board. Investigators discover that a bomb from Sikh militant group Babbar Khalsa caused the explosion.

Brazil's Lencois National Park is known as the whitest spot on earth for its sand dunes. Join us as we explore the animals and people who live in this environment.

Aloha Airlines Flight 243 was a scheduled Aloha Airlines Boeing 737 flight between Hilo and Honolulu in Hawaii. On April 28, 1988, the aircraft suffered extensive damage after an explosive decompression in flight, but was able to land safely at Kahului Airport on Maui. One crew member was blown out of the airplane and another 65 passengers and crew were injured. The extent of the damage was only just below that which would have caused the airliner to break up, and the survival of the aircraft with such a major loss of integrity was unprecedented and remains unsurpassed.

Auburn Calloway, a disgruntled ex-employee of the airline, attempted to hijack FedEx flight 705 and crash it into the FedEx HQ in Memphis

The M/V Paul R. Tregurtha is the largest vessel ever to sail on North America's Great Lakes; Tregurtha was designed to carry as much cargo as possible from the western tip of Lake Superior to the industries along the lower lakes.

Investigating a series of fires in Californias Sam Joaquin Valley that killed four, investigators determine a respected arson investigator may be the arsonist.

Investigating a series of fires in California's Sam Joaquin Valley that killed four, investigators determine a respected arson investigator may be the arsonist.

She's the biggest, meanest, most lethal weapon in the arsenal of a global power. The USS Nimitz, like the whole US Navy, has to be ready for any mission, anywhere in the world. That's why she undergoes a rigorous - and often dangerous - evaluation before every deployment. And for four days in February, Mighty Ships was aboard while the supercarrier and her young crew were put through their paces.

One of America's most ambitious construction projects is currently underway on the outskirts of Washington, D.C. The 40-year-old Woodrow Wilson bridge, which carries drivers over the Potomac River while allowing boats to safely use the heavily trafficked water below, has proven inadequate for the demands of the 21st century. But, engineers have devised a solution: an updated, draw-span design that will accommodate increased traffic both above and below. Watch as the 2,000-ton bridge is shipped by barge from Florida to Maryland and carefully lifted into place, using precariously balanced strand jacks in the water. Then, see how workers install the massive concrete support piers – so huge that a special vehicle is commissioned to transport them to the site.

Explore the dangerous boundary between humans and automation when it comes to aviation safety.