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News | Sept. 25, 2022

Vandenberg’s final Delta IV Heavy launch with NROL-91 mission

CHANTILLY, Va. – The National Reconnaissance Office—in partnership with the United 
Launch Alliance and the U.S. Space Force’s Space Launch Delta 30 and Space Systems 
Command—marked the end of an era with the NROL-91 mission today at 3:25 p.m. Pacific 
Time / 6:25 p.m. Eastern Time. This was the fifth and final United Launch Alliance Delta IV 
Heavy rocket to launch from Vandenberg Space Force Base since 2011.

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