Retired Staff Sgt. Kristoffer Schnieder, 319th Security Forces Squadron patrolman, unveils the Defender Memorial at the 319th SFS headquarters building May 21, 2014, on Grand Forks Air Force Base, N.D. The Defender Memorial is dedicated to the lives of fallen Security Forces Airmen who have sacrificed their lives in the line of duty for the safety and protection of others. (U.S. Air Force photo/Senior Airman Xavier Navarro)