Alliant Techsystems (NYSE: ATK) supported the successful launch of an Orbital Sciences Corporation air-launched Pegasus XL® vehicle from the Ronald Reagan Ballistic Missile Defense Test Site from Kwajalein Atoll in the Pacific Ocean. The Pegasus was carrying the Interstellar Boundary Explorer (IBEX) spacecraft into space. ATK provided propulsion for all three stages of the air-launched vehicle. ATK's Orion motors — manufactured in Magna, Utah — have been used to successfully launch the Pegasus since its first mission in 1990. The Pegasus vehicle's payload fairing, inter-stage raceways, and the filament-wound solid rocket motor cases were produced in Clearfield, Utah.