Similar to the space shuttle in appearance, the diminutive X-37B is about a quarter the size of the old shuttles.
A vehicle built by NASA that is capable of taking off from Earth, carrying a crew and a cargo into space, and returning to Earth to be used again. It is used primarily to transport a crew to an orbiting space station and to deploy and retrieve satellites.
Note: The space shuttle Challenger exploded shortly after liftoff in 1986. All seven crew members died in the accident.