From which Movie is this quote?

You don't seem to want to accept the fact you're dealing with an expert in guerrilla warfare, with a man who's the best, with guns, with knives, with his bare hands. A man who's been trained to ignore pain, ignore weather, to live off the land, to eat things that would make a billy goat puke. In Vietnam his job was to dispose of enemy personnel. To kill! Period! Win by attrition.