This one focuses on Kerry's medal-throwing after his return home from Vietnam. None of the Vets themselves appear in this commercial. It consists primarily if imagery of Kerry speaking on a talk show in 1971 and footage of anti-war protesters throwing medals over the White House fence.
Its a moving statement even though it doesn't contain anything we didn't already know about Kerry.
Another interesting tid-bit from Kerry's past is this Vietnam Veterans Against the War flyer found by Worldnet Daily:
As you can see, the flyer alleges some fairly ugly deeds which were supposedly committed by soldiers (the VVAW vets themselves) in Vietnam. I would assume, since Kerry was a leader of those group, that the flyer represents Kerry's actions in Vietnam as well.
Given Kerry's radical, anti-war past can we really trust what he says during this campaign about keeping America safe?