kenny tyndall is one of dozens of volunteers who lends his farmland. kenny tyndall: when you go rushing into a building and it's a baited ambush, it's a no-win situation sometimes for them, but sometimes we hope it teaches them about certain things, and also about trust and building rapport. scott: what you teach them here, moment for them when they're -- difference when they are downline? kenny tyndall: we hope it does, we certainly hope it does, because if it doesn't, they are going to get killed. >> you've got two over here, let's get these pictures. kenny tyndall: the training of the green beret is to train other countries to put their soldiers in line. scott: the goal of this day's exercise against an overwhelming force of volunteers posing as enemy combatants is for them to realize they are in over their heads and to retreat, which they the army special forces became known as "green berets" in 1961, when president john kennedy toured fort bragg, watched their tactics, and, noting their headgear, sent their commander a letter stating, "the challen