To punctuate the point...
...this sort of thing is happening on a daily basis in Iraq and will continue:
Mortar attack kills 7 in central Baghdad
Tuesday, August 17, 2004 Posted: 9:39 AM EDT (1339 GMT)
BAGHDAD, Iraq (CNN) -- A mortar exploded in a busy section of central Baghdad around noon Tuesday, killing seven people and wounding 47 others, an Interior Ministry official said.
Unfortunately, the Iraqi people will blame the presence of the Americans in their country for these attacks which will feed further malcontent and violence. This is why starting an unprovoked war in Iraq was reckless foreign policy, based upon failed intelligence and naive thinking about how the world works.