Boeing’s proposal won Phases 2 and 3 of DARPA’s XS-1 program, and I’m pretty bummed about it. And the Air Force announced that SpaceX will launch the fifth X-37B mission in August.

This episode of Main Engine Cut Off is brought to you by 14 executive producers—Kris, Pat, Matt, Jorge, Brad, Ryan, Laszlo, Jamison, Guinevere, Nadim, and four anonymous—and 52 other supporters on Patreon.

• Thoughts on XS-1 - Main Engine Cut Off
• DARPA selects Boeing for spaceplane project - SpaceNews.com
• Bulgariasat launch realigns; SpaceX secures X-37B launch contract | NASASpaceFlight.com
• SpaceX will launch next secret X-37 Air Force mission - SpaceNews.com
• Tory Bruno says ULA didn’t get to compete for Air Force X-37B launch that went to SpaceX - SpaceNews.com
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