BARKSDALE AFB, Louisiana, Aug. 18 -- The U.S. Air Force Global Strike Command issued the following news: * * * SF-WTIC graduates forge tactical excellence at Nellis * NELLIS AIR FORCE BASE, Nev -- Class 25-A of the Security Forces Weapons and Tactics Instructor Course, or SF-WTIC, graduated Aug. 8 at Nellis Air Force Base after 18 weeks of rigorous training designed to produce expert tacticians and integrators for the Security Forces career field. SF- WTIC develops weapons and tactics in  more