Two F-16 Fighting Falcons from the 188th Fighter Squadron, 150th Fighter Wing, New Mexico Air National Guard, Kirtland Air Force Base, New Mexico, wait to take off on a mission during ROVING SANDS '97 as a Southwest Airlines passenger jet taxis across the active runway. ROVING SANDS is a multinational effort and is the largest military exercise on United States soil that allows training in a joint environment to hone command and control procedures and integrate new systems in Theater and Air Missile Defense