Retired Staff Sgt. Alonzo Lunsford still remembers the tings each time a metal shell casing hit the floor inside the Soldier Readiness Processing Center at Fort Hood, Texas, five years ago.
Lunsford was working in the center when Maj. Nidal Hasan opened fire on those inside. The attack on Nov. 5, 2009, left 13 people dead and more than 30 injured.
Lunsford was at a work-station to check in soldiers for medical evaluations before deployments when the shooting started and he dropped to the floor.