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LOMPOC, Calif. — United Launch Alliance used a Delta IV Heavy rocket to launch the NROL-71 mission on behalf of the National Reconnaissance Office Jan. 19, 2019. The mission lifted off at 11:10 a.m. PST (19:10 GMT) from Vandenberg Air Force Base's Space Launch Complex 6. The flight encountered no fewer than seven delays before finally taking flight, ferrying its payload to its clandestine destination. Photos courtesy: Ashly Cullumber