A Boeing E-4B plane in the skies could be an ominous signal of impending doom as the vessel is designed to be deployed ahead of a deadly nuclear attack. Nicknamed the 'doomsday plane' because of ...

Both satellites and balloons have played a role in reconnaissance, but which is more effective? Read more: 14 Best Fighter Planes And Jets ... to fall out of the sky (which a balloon will do ...

Have you got a sharp eye? Put your vision to the test by trying this puzzle, which asks you to spot the plane in the sky. As aircraft tend to be huge, you shouldn't think it would be that difficult.

Legends of the Sky: The Liberty Plane is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet ...