Last Sunday (October 7), SpaceX launched another Falcon 9 rocket. This one carried a cargo-laden Dragon capsule to the International Space Station on the first formal mission under the Commercial Resupply Service contract with NASA. It was the fourth launch of a Falcon 9, the ninth overall launch for SpaceX, and was a partial failure. One of the nine Merlin engines shut down prematurely, just 79 seconds after launch. The rocket managed to get the Dragon into orbit but missed its secondary objective of putting a commercial satellite into the correct orbit. The whole story, and why the Falcon was able to fly with one engine out, is over at Motherboard. In the press release addressing the failed engine, SpaceX singled out the Saturn V as another rocket that had engine failure problems. The Saturn V had more than just engines fail – one was struck twice by lightning – but two launches did have engine failures in the second stage. The story of both these missions is over at Discovery News.