This week in SF history— 15/16 April 1960: Luna E-3 no1 and no2 failures (wikipedia.org)(wikipedia.org) (astronautix.com) — Similar to successful Luna 3 mission (wikipedia.org)Spaceflight news— Beresheet crashes on the moon (planetary.org)(spacenews.com)(spacenews.com)Short & Sweet— DARPA contest seeks to improve rapid launch capabilities (darpa.mil)— A successful test flight for Stratolaunch. (spaceflightnow.com) (youtube.com)— Rocketlab unveils Photon smallsat bus (spacenews.com)— Software simulation begins for SLS. (nasaspaceflight.com)