Delta 4 rocket successfully lofts clandestine NRO satellite into orbit
Watch a replay of the Delta 4 NROL-47 launch
Photos: Mobile gantry rolled back to reveal Delta 4 rocket at Vandenberg
Live coverage: Delta 4 launches from California with spy satellite
United Launch Alliance kicked off its 2018 launch campaign with a Delta 4 rocket flight at 2:11 p.m. PST (5:11 p.m. EST; 2211 GMT) Friday from Vandenberg Air Force Base in California. Gusty winds forced officials to call off a launch attempt Wednesday, and technical problems halted a countdown Thursday multiple times. The Delta 4 launched with a top secret spy satellite for the National Reconnaissance Office.
Delta 4 rocket, clandestine spy satellite ready for liftoff from California
Classified payload hoisted atop Delta 4 rocket at Vandenberg
Delta 4 launch from California slips to January
The launch of a top secret National Reconnaissance Office spy satellite from Vandenberg Air Force Base in California has been pushed back from Dec. 13 until no earlier than Jan. 10 to complete software validation on the Delta 4 rocket’s new avionics system, United Launch Alliance announced Wednesday.