Master Sgt. John Franke, 11th Security Forces Group NCOIC resource advisor weighs back packs for the 11th SFG, National Police Week Ruck March on May 15, 2013 at Joint Base Andrews, Md. Participants filled their back packs with sand, weights and medicine balls to meet the 35 pound minimum requirement. (U.S. Air Force photo/Airman 1st Class Nesha Humes)