Master Sgt. Michael Rumora, first sergeant with the 58th Maintenance Squadron, uses a flashlight to direct a driver entering the base through Gibson Gate to a random urinalysis site during a gate sweep April 2. The 377th Medical Operations Squadron often conducts gate sweeps during early morning hours to deter military members from using illegal drugs and abusing controlled substances. (U.S. Air Force photo by Master Sgt. Phyllis Keith)