A Delta 4 Heavy rocket carrying a payload for the National Reconnaissance Office prepares to lift off June 11 from Cape Canaveral Air Force Station. Credit: Josh Dinner/SpaceNews

WASHINGTON — The Air Force Space and Missile Systems Center announced May 9 it awarded United Launch Alliance a $149 million contract modification for a Delta 4 Heavy launch of the National Reconnaissance Office mission NROL-68, the second of three missions awarded to ULA under the Launch Vehicle Production Services contract.

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Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...