MILITARY SPACE
Reusable Spacecraft
Cape Canaveral and Los Angeles Originally designed for NASA, the X-37B is a reusable, uncrewed spaceplane now operated by the U.S. Space Force, whose two vehicles have so far spent nearly 4,200 days in space during seven missions (see table on p. 45), the latest of which is ongoing.
By Irene Klotz,Vivienne Machi7 min