In Orbital Sciences' Pegasus processing facility at Vandenberg Air Force Base's in California, the Pegasus XL rocket is readied for flight. Once the spacecraft is integrated with the rocket in mid-February, the rocket and spacecraft will be flown on Orbital's L-1011 carrier aircraft to the Ronald Reagan Ballistic Missile Defense Test Site at the Pacific Ocean's Kwajalein Atoll for launch. Image credit: NASA/Randy Beaudoin, VAFB Jan. 31, 2012