U.S. Air Force Staff Sgt. Eduardo Calderon, the sole arresting system certifier at the 173rd Fighter Wing in Klamath Falls, Oregon, describes the checks he conducts to another member of the civil engineer squadron to the braking mechanisms located in underground rooms on either side of the runway. The equipment consists of large braking drums as well as four-cylinder, gas motors needed to retract the cable after deploying to stop an aircraft. (U.S. Air National Guard photo by Tech. Sgt. Jefferson Thompson)