Bush has made a big deal out of the ties between Zarqawi and Al Qaeda. The ammo dump incompetence issue will soon be played out. Kerry has to hammer away on something new, and I would suggest something just as important: the Bush failure to take out Zarqawi when it could have easily been done prior to the war. His Ansar Al-Islam group was operating near Kurdish territory prior to the war, it was known they were bad actors, and a couple of smart bombs could have taken him out.
Instead Zarqawi was let off to attack our troops later. The Wall St. Journal did a piece on this recently. Attack!