If Iraq had no nuke program, why is the IAEA worried?

A report in CNN indicates that the IAEA is concerned that high-level equipment that could make nuclear bombs is not present in Iraq where the IAEA expected it to be and that the buildings that housed the equipment have been dismantled. The US did not plant the equipment nor erect the buildings, therefore it seems to the uninitiated that Iraq DID have either the capacity or desire (or both) to go nuclear. Combine this story with the satellite photos of massive cargo trucks crossing west from Iraq to Syria just before the Coalition invasion and it seems that the US needs to start leaning HARD on Boy Assad.