Raymond Brown, left, and Air Force Staff Sgt. Paul Sheehan tighten down chains locking down a mobile air traffic control tower onto a C-17 Globemaster III at Mountain Home Air Force Base, Idaho, Sept. 12, 2017, during relief efforts following the aftermath of Hurricane Irma. Brown is an installation transportation officer and Sheehan is an air transportation craftsman assigned to the 366th Logistics Readiness Squadron. Air Force photo by Airman 1st Class JaNae S. Capuno