U.S. Air Force Col. Kenneth Thompson, Nevada Test and Training Range commander, and Mrs. Yvonne Gresnick, NTTR deputy director, unveil the new NTTR building sign at Nellis Air Force Base, Nev., after 98th Range Wing was officially re-designated the NTTR June 21, 2011. Like the 98 RANW, The NTTR will remain a direct reporting unit to the U.S. Air Force Warfare Center and continue to operate, maintain and manage the 2.9-million-acre range (42 percent of the land managed by the U.S. Air Force) and 12,000 square miles of military airspace. More than 1,000 military, civilian and contract personnel are assigned to the organization. (U.S. Air Force photo by Senior Airman Brett Clashman/Released)