Photo essay: Night exercise at Osan Air Base Published Nov. 4, 2009 By Staff Sgt. Brian Ferguson 51st Wing Public Affairs Office OSAN AIR BASE, South Korea (AFNS) -- Airmen from the 51st Security Forces Squadron participated in a night training exercise here to evacuate Airmen from a "car bombed" building and to oppose the "enemy" forces that were planning to ambush the evacuees Nov. 3, 2009. The simulation was part of a base operational readiness exercise. View slideshow.