A United Launch Alliance (ULA) Delta IV Heavy rocket carrying a payload for the National Reconnaissance Office (NRO) lifted off with the NROL-91 mission from Space Launch Complex-6 at Vandeberg Space Force Base, Calif. on Sept. 24 (ULA Photo)
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The National Reconnaissance Office’s (NRO) NROL-91 mission lofted into orbit aboard a United Launch Alliance (ULA) Delta IV Heacy rocket on Sept. 24–the fifth and final Delta IV Heavy launch from Vandenberg Space Force Base, Calif., since 2011.
ULA…