A United Launch Alliance (ULA) Delta IV Heavy rocket carrying the NROL-91 mission for the National Reconnaissance Office (NRO) lifted off on Sept. 24 at 3:25 p.m. PDT from Space Launch Complex-6 at Vandenberg Space Force Base. To date, ULA has launched 153 times with 100 percent mission success.

"The NRO has been, and continues to be, a phenomenal partner through 32 collaborative launch campaigns, stemming from ULA’s very first launch in 2006," said Gary Wentz, ULA vice president of Government and Commercial Programs. “This mission was ULA’s 96^th National Security mission and the NRO’s 10^th mission on board a Delta IV Heavy launch vehicle a history that we are very proud of.”

“This was also ULA’s 95^th Delta mission from Vandenberg Space Force Base and our fifth and final Delta IV Heavy from the West Coast, completing a long, successful tenure of delivering critical national security payloads,” added Wentz. “We look forward to preparing Space Launch Complex-3 for future Vulcan flights from the West Coast.”

ULA’s next launch is a commercial launch of the SES-20 and SES-21 missions, planned for Sept. 30 from Cape Canaveral Space Force Station, Florida.

Leveraging a legacy of 100 percent mission success, and launching more than 150 missions to explore, protect, and enhance our world, ULA is the nation’s most experienced and reliable launch service provider with world-leading reliability, schedule confidence, and mission optimization. We deliver value unmatched by any launch services company in the industry, a tireless drive to improve, and a commitment to the extraordinary.

Click here to learn about the United Launch Alliance's Delta IV Heavy Rocket.