"The X37B OTV-4 has returned from orbit and has landed safely at the Kennedy Space Center. The X-37 spent over 700 days in space,” the Air Force reported.
Experts believe that the X-37B, launched like a satellite atop Atlas 5 rockets and then landing like an airplane, could also serve as a prototype of a space interceptor or a spy plane.
The OTV-4 is already the fourth orbital laboratory built as part of the X-34 program.
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