The 12th issue of RocketSTEM magazine - www.rocektstem.org - brings you both the success of space exploration – with the debut of the lunar rover on the Apollo 15 mission – as well as the failures – such as the three resupply missions to the ISS lost in the past nine months. We also feature an interview with astronaut Al Worden, and invite you to build and launch your own rockets in Kerbal Space Program.