ATK’s CASTOR® 30 was ground tested at the U.S. Air Force’s Arnold Engineering Development Center (AEDC) on December 9, 2009 in a specialized vacuum chamber that simulates the altitude at which the upperstage motor will operate. This was the longest rcoket motor test ever in the J-6 Large Rocket Motor Test Facility, which became operational in 1994. (Air Force photo by Rick Goodfriend)