Staff Sgt. Craig Ritter and 1st Lt. Joshua Loomis move into position to place ground sensors for an enemy movement and detection training scenario Feb. 14, 2013 at Bagram Airfield, Afghanistan. The team uses a series of search techniques from simple eyes-on to ground sensors to track insurgent activity and provide site exploitation after an attack. Ritter and Loomis are 755th Expeditionary Security Forces Squadron Reaper team trackers. (U.S. Air Force photo/Senior Airman Chris Willis)