Nellis surgeons, UMC combine efforts to treat Las Vegas shooting victims Air Force Lt. Col. (Dr.) Jason Compton, left, and Air Force Maj. (Dr.) Charles Chesnut, 99th Medical Group general surgeons, pose for a portrait in the Mike O'Callaghan Military Medical Center at Nellis Air Force Base, Nev., Oct. 3, 2017. The surgeons were two members of the team that took in trauma patients at the University Medical Center of Southern Nevada during the Las Vegas shooting Oct. 1, 2017. Air Force photo by Senior Airman Kevin Tanenbaum SHARE: Download: Full Size (1.38 MB) Credit: Senior Airman Kevin Tanenbaum VIRIN: 171004-F-YM181-002.JPG Photo Gallery