Col. Jeffrey Taliaferro, 28th Bomb Wing commander, is briefed before he prepares to tour the upgraded B-1 simulator April 13, 2011, at Ellsworth Air Force Base. The 18.4 million dollar upgrade covers all four B-1 simulators, two of which are here at Ellsworth and the other two are at Dyess Air Force Base. (U.S. Air Force photo/Senior Airman Adam Grant)