U.S. Air Force photo by Airman Nathan H. Barbour/Released

U.S. Air Force photo by Airman Nathan H. Barbour
U.S. Air Force Staff Sgt. Michael McNally, 355th Maintenance Group scheduler, removes the cover from an adhesive strip on a block of C4 plastic explosive during an explosive ordnance disposal immersion course at Davis-Monthan Air Force Base, Ariz., June 28, 2016. McNally has worked in the maintenance support field for the past eight years.

U.S. Air Force photo by Airman Nathan H. Barbour/Released

U.S. Airmen prepare to board a C-23 Sherpa during the Military Freefall Jumpmaster Course at Davis-Monthan Air Force Base, Ariz., June 28, 2016. During each free fall, the success of the mission and the lives of others are in the hands of the jumpmasters.

U.S. Air Force photo by Airman 1st Class Mya M. Crosby

U.S. Air Force Airman 1st Class Matthew Wolf, 355th Security Forces Squadron member, loads his equipment into a vehicle at Davis-Monthan Air Force Base, Ariz., July 7, 2016. The 355th SFS mission is to protect, defend and fight to enable Air Force, joint and coalition mission success.

U.S. Air Force photo by Airman Nathan H. Barbour/Released

U.S. Airmen and civilians from the 355th Comptroller Squadron volunteer at the Food Bank of Southern Arizona, Ariz., in Tucson, July 14, 2016. They participated in a three hour volunteer shift, which involved sorting and boxing different kinds of nonperishable foods.

U.S. Air Force photo by Carolyn Herrick

U.S. Air Force photo by Carolyn Herrick
Tech. Sgt. Isaac Shapiro packages a jet ski to be air dropped at the 306th Rescue Squadron, Davis-Monthan Air Force Base, Ariz., July 14. He’s an Air Force Reserve aircrew flight equipment specialist for the Guardian Angel squadron here, which is part of the 943rd Rescue Group. Shapiro transitioned to the Reserve six years ago after six years of active duty service to expand his breadth of experience and be part of the unique combat-search-and-rescue mission.