The Rotating Service Structure will be moved back from space shuttle Discovery this evening as the Mission Management Team continues its discussions about a main engine controller on the shuttle. The RSS is an enclosed gantry that protects the shuttle while it’s on the launch pad. The MMT has returned from a break and is discussing the controller. The controller showed a one-time, irregular power drop. The issue was isolated to Discovery’s Number 3 engine and all the connectors were attached and retested. You can follow developments in the MMT meeting at www.twitter.com/NASA