Lt. Col. Marshal Schalvares performs preflight checks before taking part in Exercise Red Flag 13-2 Jan. 22, 2013, at Nellis Air Force Base, Nev. Schalvares walks around his jet to do a brief inspection prior to every mission to ensure mission readiness. Schalvares is assigned to the 480th Fighter Squadron. (U.S. Air Force photo/Senior Airman Daniel Hughes)