Sgt. Peter Williams from 2nd Battalion, 263rd Army Air Missile Defense Command, monitors radio traffic alongside an Avenger missile defense system during Amalgam Dart 2009 near Camp Rilea, Oregon, June 15. Amalgam Dart is a field test of the Department of Defense's ability to rapidly deploy a total air integrated defense system in the U.S. in order to deter, detect and defeat airborne threats. (U.S. Air Force photo by Staff Sgt. Jacob N. Bailey)