" viper ", 125 mm, an- 22, an-22, antaeus, antey, antonov, ar-15, art, assault rifle, background, battle, bell ah-1z, bell uh-1y, cargo, circle, doctrine, fighter- nizkoplan, fighter-bomber, gauge, gun, hawker hunter fga6/fga9, heavy, height, helicopters, high-speed, i-16 cdb- 12 , jump, land, main, military, obstacles, overcome, picture, piston, plane, planes, planes., polygon, raf, rafale apron, rockets, root, russia, russia ., sam, shot, single-engine, sky, snow, soviet, t-90, tank, the germ, the sky, transport, trucks, turboprop, venom, viper, weapon, winter