Why USO tours were vital for troop morale in the Pacific

The P-38 almost single-handedly drove back the Germans as they attempted to keep their North Africa armies supplied. In just one month, the Allies shot down over 400 German planes, while losing only 36.

Germany suffered big losses at the hands of the P-38 (3:24)

Henry Ford spent the majority of the war as a pacifist. By 1917, however, his state-of-the-art assembly line was churning out vital engine parts to feed the war machine.

How Henry Ford went from pacifist to major supplier of World War I (2:56)

The P-38 featured a revolutionary design that enabled it to travel higher and faster than any other American fighter plane during the 1930s. It did this with huge, in-line engines and a super turbo charger.

How the P-38 flew faster and higher than its rivals (2:57)

The Lockheed C-5 Galaxy is primarily a giant cargo aircraft—and to load it, you need a giant opening. The solution: the nose cone of the aircraft, known as the visor, swings up to reveal a massive door.

The amazing way cargo is loaded onto a C-5 Galaxy (2:43)

The C-5 Galaxy is a true giant among USAF cargo planes—but its development was not without problems. Just four years after it made its debut, a serious design flaw threatened the future of the entire line.

The C-5 Galaxy had a catastrophic design flaw (3:30)

Climb into the guts of a hovercraft, as a team of salvage experts, led by a former NASA engineer, disassemble and cut through this iconic and unique vehicle.

Take a look inside one of the most unusual vehicles ever (2:43)

What's it like to operate a giant hovercraft? There's no better person to ask than a U.S. Navy pilot who has driven the LCAC on tours of duty in Iraq, Afghanistan, and Haiti.

The only way to really understand a hovercraft is to drive one (3:15)

Wales is home to one of the most perfectly-preserved Roman fortifications in all of northern Europe. In Caerwent, near the southern city of Newport, sections of the original first century Roman wall still remain.

Why Wales is the place to see amazing Roman forts (1:49)

The beginning of space exploration was full of questions and unknowns; until they started sending living organisms into orbit, no one knew if the vacuum of outer space would be deadly.

What a sunset on Earth looks like from the moon (2:23)