Senior Airman Adam Smith aims a light gun as he works in the control tower at Ali Base, Iraq.
Senior Airman Adam Smith aims a light gun as he works in the control tower at Ali Base, Iraq, on March 8, 2006. The light gun is used to communicate with pilots of aircraft and drivers of vehicles when all radio communications are down. Smith is an air traffic controller with the U.S. Air Force's 407th Expeditionary Operations Support Squadron.