This week in SF history— June 11 1928: Flight of the first rocket-powered plane (wikipedia.org)Spaceflight news— VSS Unity flies again. (spaceflightnow.com) (youtube.com) — COG overlay. (twitter.com/jdeshetler)Short & Sweet— DARPA wants in on NewSpace (spacenews.com)— GOES-17 can’t keep its cool (americaspace.com)Questions, comments, corrections— Ignition! by John D Clark is now an audiobook! (amazon.com)Interview: Delft Aerospace Rocket Engineering— We talked to Daan van Heteren, propulsion engineer— dare.tudelft.nl — twitter.com/DARE_TUDelft — linkedin.com — facebook.com