After a delay of nearly two months owing to a technical glitch, the Air Force’s secretive X-37B space plane blasted off again from Cape Canaveral, Florida, atop an Atlas rocket on Tuesday.
The launch starts the third mission in three years for the robotic X-37 fleet, assembled in Boeing’s now-shuttered Building 31 in Huntington Beach, California, for an estimated $1 billion apiece. But for all the time spent in orbit by the two school bus-size spacecraft — 693 days in all — it’s no more clear today precisely what the Air Force has been up to with the X-37s.
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