sounds like some strong-arm tactics by Kerry's campaign. I mean, this isn't the election for the 8th Grade class president, this is the big time. So many people are so invested in Kerry winning, and somethng like this is just the thing that could ruin it for them. Kerry has been playing up his macho image, and parading his medals around, and now if a group of veterns who have served with Kerry claim that he didn't deserve them, if they destroy his soldier image, that will likely have a noticeable effect on the election.
Kerry's backers are very powerful, so my guess is that they made a few phone-calls, twisted a few arms and -presto- the man retracts his statement in such a hurry that he isn't able to adequately explain why he retracted it or, if he believes the information was false, why he made it in the first place.