If you spot a specific type of aircraft looming in the sky, it might signal that humanity is on the brink of catastrophe.

The sky may seem like a huge open playground for airplanes to fly without speed limits in any direction they wish. In reality, planes adhere to certain rules and follow fixed flight paths, much like ...

ANGELES NATIONAL FOREST (KABC) -- A safety expert talked about what could have occurred after an air traffic controller error sent a jet from LAX into the flight path ...

The sky is a wide-open expanse of seemingly endless open air. But even thousands of feet above the ground, there are still rules that must be followed. Planes can't simply fly wherever they wish.