Posted: Fri, Mar 30, 2012, 6:56 AM ET (1056 GMT)
The launch of a classified satellite on a Delta 4 has been postponed to at least Monday to complete analysis of an upper-stage issue. The Delta 4 Medium-Plus (5,2) was originally scheduled to launch Thursday from Vandenberg Air Force Base on mission NROL-25. However, United Launch Alliance postponed the launch, first to Friday, and then to Monday, to examine an unspecified issue with the engine on the rocket's upper stage. Launch is now planned for 7:04 pm EDT (2304 GMT) Monday. The rocket is carrying a satellite for the National Reconnaissance Office that observers believe to be a radar imaging satellite.
