Officials remained tight-lipped about a satellite that could be somewhere in orbit -- or crashed into the sea.
While the launch was deemed successful, the payload failed to reach orbit.
Argentina's defense ministry said it detected seven satellite signals that may be an attempt by the submarine to resume conta...
Ten commercial Earth-imaging satellites have been launched into space from California.
News bulletin in 1957: Sputnik stuns the world. CIA in 2017: Not really.
The Air Force has two of the spaceplanes, which are known officially as X-37B Orbital Test Vehicles.
SpaceX launched a top-secret spy satellite for the U.S. government Monday and then successfully landed the booster for recycl...
The goal is to train the service members to combat evolving threats against the service's "vulnerable" space infrastructure.
A rocket carrying a classified U.S. satellite for the National Reconnaissance Office has been launched from California.
Missiles, submarines and nuclear warheads played major roles in the Cold War experience, but another development was as signi...