In the years after World War Two, neutral Sweden embarked on an ambitious plan – build its own atomic bomb.

The F-16 jet fighter took its first ever flight in 1974, but it is still as important an aircraft now as it was then.

The atomic bomb tests at Bikini Atoll in 1946 were too dangerous for conventional aircraft to observe. Pioneering remote-controlled drones, however, were a perfect match.

In the 1950s, with the USSR seemingly sprinting ahead in the space race, US scientists hatched a bizarre plan – nuking the surface of the Moon to frighten the Soviets.

The Chinese balloon that drifted across the US last week flew far higher than passenger jets. How high and how far can they travel?

Orford Ness is now one of Britain's most protected natural landscapes. For decades, however, it was the hidden nerve centre of secret military research.

In World War Two, the Soviet Union devised a tank that could fly into battle. What happened to this ingenious, if unorthodox, concept?

The US has lost at least three nuclear bombs that have never been located – they're still out there to this day. How did this happen? Where could they be? And will we ever find them?