United Launch Alliance (ULA) will launch the NROL91 mission for the National Reconnaissance Office (NRO) atop a Delta IV Heavy. Launching from Space Launch Complex 6 at the Vandenberg Space Force base, in California, this mission will mark the final Delta IV Heavy launch from the west coast and the thirdtolast Delta IV Heavy launch ever. ULA is retiring both the Delta and Atlas vehicles in favor of Vulcan, which is scheduled to have its maiden launch in Q1 2023.

Check out our Prelaunch Preview to learn more about this mission! https://everydayastronaut.com/nrol91...

00:00 Intro
03:35 Prelaunch Preview
10:15 Q&A
19:23 ULA Stream Starts
1:03:30 Go / NoGo Poll
1:10:45 Lift Off
1:14:50 Booster Separation
1:16:35 BECO / Stage Sep / Fairing Sep
1:17:55 Q&A



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