The Liberals perceive that Kerry has vulnerability on certain elements of his Vietnam military record. This is part of an effort to blunt the issue. Doesn't look very successful to me. I thought Bush handled both Russert and the National Guard issue just fine.
If not being very enthusistic about going to Viet Nam in one of the regular Army units is a problem, most of his generation has much worse problems and most of them are going to vote.
Bush served in the military; flew military aircraft; qualified as a military aircraft pilot. No record of him being AWOL or otherwise in violation, he got an honorable discharge--end of story.
Further, many of you Bushbots have a very thin skin--the Russert interview was a hands down win for Bush in every possible way. Russert is clearly a motivated liberal on the other side--Bush handled him perfectly and came away with a win. If he can do this every day, he wins reelection.