Aerojet Rocketdyne, a GenCorp company, played a major role to successfully place a classified payload into orbit for the U.S. government with the inaugural launch of an RL10C-1 upper-stage engine. The mission was launched from Vandenberg Air Force Base in California aboard a United Launch Alliance Atlas V rocket, which also used Aerojet Rocketdyne helium pressurization tanks, four AJ60 solid rocket boosters and a dozen upper-stage thrusters used for roll, pitch, yaw and settling burns.