A look at the U.S. Air Force’s unmanned X-37B space plane, which has flown four secret, long-duration missions in Earth orbit to date.
from Space.com bit.ly/2oZ3KpZ
A look at the U.S. Air Force’s unmanned X-37B space plane, which has flown four secret, long-duration missions in Earth orbit to date.
from Space.com bit.ly/2oZ3KpZ
A look at the U.S. Air Force’s unmanned X-37B space plane, which has flown four secret, long-duration missions in Earth orbit to date.
from Space.com bit.ly/2oZ3KpZ
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