Senior Airman Steven Santos, 23rd Special Tactics Squadron, conducts air traffic control Dec. 10, 2010, at Eglin Air Force Base's Field 6, Fla at night. Over a dozen 23rd STS Airmen parachuted from a C-130 into the drop zone. Airman Santos was receiving upgrade training on the drop zone and is a combat controller.(U.S. Air Force Photo by Senior Airman David Salanitri / RELEASED)