U.S. Air Force Master Sgt. Jeremiah Graves (left), 455th Expeditionary Civil Engineer Squadron heavy equipment supervisor, and Master Sgt. Joshua Graves, 455th ECES project manager, conduct measurements for a project at Bagram Airfield, Afghanistan July 1, 2014. Joshua and Jeremiah, identical twins from Duluth, Minn., are deployed from the Air National Guard’s 148th Fighter Wing, Duluth, Minn. (U.S. Air Force photo by Airman 1st Class Bobby Cummings/Released))