Did our commander in chief go AWOL during the Vietnam War?

I think this article in today's Washington Post makes clear that the issue of George Bush's missing-in-action status during the Vietnam War is now relevant once again.

We are a nation at war and it is unnacceptable that there be any doubt in our troops' minds as to whether their commander in chief is a traitor and a coward. Again, the Washington Post article makes clear that the issue as to whether George Bush, standing before the American people as a holier-than-thou spokesman for the war in Iraq, is truly fit to be such a spokesman, let alone the commander in chief of our brave men and women in uniform.

Our troops deserve nothing less than the truth. Is our commander in chief a coward?