Hey, JimRob, your guess is as good as mine there. Here's a link for you, though. The same McNamara who brought us the M-16 disaster... http://www.answers.com/main/ntquery?s=Robert+McNamara&gwp=13
McNamara is a steenking liar. The only battle we lost in Viet Nam wasn't in Viet Nam. It was in Walter Kronkite's treasonous diseased mind.