Air Force Staff Sgt. Jesse Armstrong looks on as Army Sgt. 1st Class Jesse Thorton demonstrates the cross collar choke on Air Force Staff Sgt. Mark Velasquez at Joint Base San Antonio-Lackland, Texas, June 12, 2012. Armstong and Velasquez are security forces technical training instructors with the 343rd Training Squadron. Thorton is the NCO in charge of the Army III Corps combatives program at Fort Hood, Texas. (U.S. Air Force photo/Alan Boedeker)