suicide bombings
more suicide bombings
A short search will bring up many more. And you might notice that WAY more Iraqi's are being targeted than Americans. Most suicide bombings I hear of are directed towards the new Iraqi police forces.
These people arent fighting to take Iraq back. They have it, it belongs to them, not us. They are fighting for power. They want us out so they can take power for themselves, rather than allowing the country to elect it's own leader.