Air surveillance
ELMENDORF AIR FORCE BASE, Alaska -- Tech. Sgt. Jeffery Austin monitors radar to track and identify air traffic in Alaska and Canada during Alaska Shield/Northern Edge 05 here Aug. 15. The exercise assembles an integrated federal, state and local capability of prevention, preparedness, response and recovery for extreme events including terrorism. Sergeant Austin is an air surveillance technician with the 176th Control Squadron here. (U.S. Air Force photo by Airman 1st Class Anthony Nelson Jr.)