Two events worth discussing happened while I was on vacation—the first Block 5 Falcon 9 took flight, and ULA selected RL10 for Centaur V.

This episode of Main Engine Cut Off is brought to you by 33 executive producers—Kris, Pat, Matt, Jorge, Brad, Ryan, Jamison, Nadim, Peter, Donald, Lee, Jasper, Chris, Warren, Bob, Brian, Russell, John, Moritz, Tyler, Joel, Jan, David, Grant, Barbara, Stan, Mike, and six anonymous—and 164 other supporters on Patreon.

• Bangabandhu Satellite-1 Mission | SpaceX
• SpaceX launches Bangladeshi satellite on debut Block 5 Falcon 9 mission - SpaceNews.com
• RL10 Engine to Power ULA’s New Vulcan Centaur Upper Stage | Aerojet Rocketdyne
• ULA selects Aerojet to provide Vulcan upper stage engine - SpaceNews.com
• Episode T+63: Centaur V, BFR Updates - Main Engine Cut Off
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