The New Year's attack that turned the tide of the Vietnam War

The F-117 Nighthawk is the ultimate stealth fighter, virtually undetectable to radar. But on a bombing raid over Belgrade in 1999, Colonel Dale Zelko is shocked to see two missiles locked in on his plane.

A U.S. bombing mission over Serbia turns into a nightmare (3:32)

The NTSB investigation into the crash of the VSS Enterprise on October 31 2014 zeroes in on a faulty display. Did this convey false information to the pilots?

Did a faulty display mislead SpaceShipTwo pilots? (2:49)

It's a tricky assignment: transporting a giant satellite dish 500 miles by lorry through narrow French roads, to the Belgian port of Antwerp. From there, it will be loaded onto a ship sailing to Chile.

French roads may not be big enough for this giant satellite dish (3:21)

The VSS Enterprise, which crashed on October 31, 2014, was powered by a new rocket motor with an experimental hybrid fuel. Did this cause the spacecraft to go down?

Why did Virgin Galactic's SpaceShipTwo break apart mid-flight? (2:58)

The Spitfire transport team is relieved their disassembled plane has made it safely across the Atlantic. But now comes the tricky part: getting the plane out, as carefully as possible.

The challenges of unpacking a World War II Spitfire (4:05)

How do you take a vintage World War II Spitfire and pack it into a cargo container for a Transatlantic journey? The answer is very carefully—the slightest damage to its outer body could be catastrophic.

Packing a vintage World War II airplane is an impossibly delicate task (4:06)

Investigators are baffled: The on-board terrain warning system on the Sukhoi Superjet 100 which went down on May 9, 2012, sounded 40 seconds before the crash—so why did the pilots ignore it?

Why was a safety alarm ignored by Sukhoi Superjet 100 pilots? (2:46)

If a 'wingtip vortex'—a concentrated air turbulence created by another airplane—was responsible for bringing down Delta Airlines Flight 1141 on August 31, 1988, investigators would expect to find another airplane in its vicinity—but was there?

Did wingtip vortices bring this airplane down? (2:02)

Without access to the crash sites of MH17, which went down on July 17, 2014, investigators can't definitively say why the crash happened. So they begin to consider all kinds of theories—including a meteor strike.

Was Flight MH17 hit by a meteor? (3:11)