Drones or UAVs are becoming more common in military aircraft and carry out some important missions. So how long can they stay in the air? Here's what we know.

U.S. President Donald Trump on Friday awarded Boeing the contract to build the U.S. Air Force's most sophisticated fighter ...

Aerial refueling is one of several critical defense ... with the construction of two infantry companies, a tactical drone section, a mechanical engineering company and off-road trucks.