Bobrin Dobrev, chief mechanic, Doug Dunham, chief pilot, and Michael A. Nicholas, director of aviations, Vertol Systems Company, Inc., stand before the Mi-24D Hind, a Russian attack helicopter owned and provided by VSC, used in select training missions of the Weapons and Tactics Instructor course here. - Bobrin Dobrev, chief mechanic, Doug Dunham, chief pilot, and Michael A. Nicholas, director of aviations, Vertol Systems Company, Inc., stand before the Mi-24D Hind, a Russian attack helicopter owned and provided by VSC, used in select training missions of the Weapons and Tactics Instructor course here.