The Nevada Test and Training Range (NTTR) is one of two military training areas used by the United States Air Force Warfare Center at Nellis AFB (cf. Eglin AFB) and has the "largest contiguous air and ground space available for peacetime military operations in the free world" (cf. Utah TTR) The NTTR land area includes a "simulated Integrated Air Defense System", several individual ranges with 1200 targets, and 4 remote communication sites. The current NTTR area and the range's former areas have been used for aerial gunnery and bombing, for nuclear tests, as a proving ground and flight test area, for aircraft control and warning, and for Blue Flag, Green Flag, and Red Flag exercises. The test range is represented as a theatre in the complex flight simulator DCS World DCS]