NASA awarded Pratt & Whitney Rocketdyne a $60.3 million contract to provide continued Space Shuttle Main Engine (SSME) prelaunch, launch, and post-launch support through March 31. The contract is an extension to the current space shuttle program flight manifest launch schedule, which shifted the last two scheduled launch dates for missions STS-133 and STS-134 to fiscal year 2011. The SSME is a high-performance reusable rocket engine that is capable of lifting heavy launch vehicles. Since its first flight in 1981, the SSME has achieved 100% mission success with more than 1 million seconds of hot-fire experience. As the most highly tested large rocket engine ever built, the SSME sets the foundation for further U.S. space exploration.