CAPE CANAVERAL AIR FORCE STATION, Fla. - A United Launch Alliance Delta II carrying NASA's Gravity Recovery and Interior Laboratory (GRAIL) lifts off Sept. 10, 2011, at 9:08 a.m. from Space Launch Complex 17, with Eastern Range support from the U.S. Air Force's 45th Space Wing. GRAIL includes two spacecraft to study the moon's interior and thermal evolution. (United Launch Alliance photo/Thom Baur)