NELLIS AFB, Nev. – Rudy Posis, a project engineer he U.S. Army Corps of Engineers Los Angeles District's Nellis Resident Office, talks with Donna Concepcion, the Flight Simulator training manager, inside one of the four simulator bays of the new F-35 Flight Simulator Facility on Nellis Air Force Base July 30. The District completed construction of the $9 million facility in May 2013.