A Russian-built SA-15B air defense radar arrived at Eielson AFB, to provide realistic surface-to-air threat training for Air Force pilots, April 21, 2011. The tracked, mobile radar, codenamed "Gauntlet" by NATO, will join a network of other threat anti-aircraft systems, such as the older SA-2 and the more sophisticated SA-10, at the Joint Pacific Alaska Range Complex supporting Red Flag-Alaska exercises. Here, the SA-15 is offloaded at Eielson.