Theories about who is behind the attacks on U-S forces in Iraq. Numerous theories abound about who is behind the increasing attacks on U.S. forces in Iraq. Some analysts believe Saddam Hussein is responsible, while others believe the attacks are the work of an Islamist cell claiming to be affiliated with al Qaeda. But the violence in Iraq may not be an organized phenomenon. Britain had a similar experience in the early 20th century, when its army lost some 2,000 troops trying to "keep the peace" in Iraq during the British occupation. NPR's Guy Raz reports.