[xoxoxoBruce]

Mission Accomplished was neither a lie nor exaggeration.
When the military finished what W had planned to do, and had asked them to do, the mission was indeed accomplished.

Unfortunately, the only thing he planned, was knocking Saddam out of his throne, and only that (mission) was accomplished. When he made that statement he probably still didn't realize what had been overlooked, in his rush to get Saddam.
He forgot, after they hit the ball you have to tell them to run the bases and in what order. Not that the military is stupid, they need authority, they need a goal and they need supply, all of which takes planning.