by Mike Wall, SPACE.com Senior Writer
Date: 20 January 2012 Time: 04:00 PM ET
An Air Force photographer snapped this profile view of the
X-37B shortly after its landing on Dec. 3, 2010, which marked the end
of the secret vehicle's maiden space mission.
CREDIT: USAF/Vandenberg Air Force Base
As of Friday (Jan. 20), the mysterious robotic X-37B spacecraft has been aloft for 321 days, significantly outlasting its stated mission design lifetime of 270 days. But it may stay up for even longer yet, experts say, particularly if the military views this space mission — the second ever for the hush-hush vehicle — as something of an endurance test.
Glenn A. Walsh, Project Director,
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