I am disappointed with some of the "deeper thinkers" on this board for not digging deeper into this issue. I am not a big conspiracy theorist, however, those who have served or been around the military enough, know that to even place a training warhead on any sort of artillery munition or missile takes a very explicit order, in most units from Battalion (or equivalent) level.
Something else to think about is just how quickly this story was shelved after the initial outcry. I am not saying what I'm not saying...just dig a little deeper boys.