51st SFS Airmen train to enhance operations Published Sept. 15, 2021 By Tech. Sgt. Kristin High OSAN AIR BASE, Republic of Korea -- Airmen from the 51st Security Forces Squadron participate in various scenarios during a routine training event at Osan Air Base, Republic of Korea, Sept. 14, 2021. Throughout the training, the Defenders are tested on various law enforcement tactics and medical care.