Delta IV-Heavy launches NROL-37

6/11/16 ~ 1:51 p.m.

A United Launch Alliance Delta IV-Heavy rocket lifts off with NROL-37.

FIRST & FIFTH PHOTOS BELOW: Named two of the Air Force's top photos of 2016!

The fifth photo shows the Atlas V with OA-6 streaking over the Heavy as it awaits liftoff.
Photos this page credit: United Launch Alliance