The European Space Agency has put the final touches to its first-ever "space plane" before blasting ...

The robotic X-37B spacecraft, which was launched from Cape Canaveral Air Force Station in Florida in...

The US Air Force's secrecy-shrouded X-37B unmanned space plane has returned to Earth after more than...

While in orbit, the X-37B Orbital Test Vehicle will conduct classified technology experiments for in...