Participants of the 11th Security Forces Group, National Police Week Ruck March, carry a giant tire around Perimeter road on May 15, 2013 at Joint Base Andrews, Md. Military service members and local policemen took part in the approximately nine mile event. (U.S. Air Force photo/Airman 1st Class Nesha Humes)

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)

Prince George’s County Police Officers sign in for the 11th Security Forces Group, National Police Week Ruck March on May 15, 2013 at Joint Base Andrews, Md. The march was open to everyone as JBA celebrates National Police Week. (U.S. Air Force photo/Airman 1st Class Nesha Humes)

1st Lt. Ashleigh Peck, Air Force District of Washington Public Affairs Command Information Chief, packs snacks and water in preparation for the 11th Security Forces Group, National Police Week Ruck March on May 15, 2013 at Joint Base Andrews, Md. Participants ran approximately nine miles around the entire base perimeter with a 35 pound ruck sacks. (U.S. Air Force photo/Airman 1st Class Nesha Humes)

Staff Sergeants Kyle Martin and Jason Leavens, 811th Security Forces Squadron executive aircraft security members ran with gas masks during the 11th Security Forces Group National Police Week Ruck March on May 15, 2013 at Joint Base Andrews, Md. The gas masks can make it harder to breathe, due to reduced air flow through the filter. (U.S. Air Force photo/Airman 1st Class Nesha Humes)

Team Andrews members run with Prince George’s Policemen during the 11th Security Forces Group, National Police Week Ruck March on May 15, 2013 at Joint Base Andrews, Md. The march was open to everyone as JBA celebrates National Police Week. (U.S. Air Force photo/Airman 1st Class Nesha Humes)

Staff Sgt. Eric Nault, 11th Security Forces Squadron response force leader hands a drink to a runner during the 11th Security Forces Group, National Police Week Ruck March on May 15, 2013 at Joint Base Andrews, Md. Sixty-four people participated in the march. (U.S. Air Force photo/Airman 1st Class Nesha Humes)

Participants of the 11th Security Forces Group, National Police Week Ruck March rest following the race on May 15, 2013 at Joint Base Andrews, Md. The 11th Security Forces Squadron hosted a barbeque and distributed awards for top finishing times. (U.S. Air Force photo/Airman 1st Class Nesha Humes)