In the Iraqi capital of Baghdad, a suicide car bomb has exploded outside the main checkpoint leading into the Green Zone for the second time in as many days. At least seven people died in the rush hour attack. Yesterday a similar bombing killed as many as 13. The BBC reports the checkpoint leading into the Green Zone has become one of the most dangerous spots in Iraq. The Green Zone houses the Iraqi government and the US embassy. In Western Iraq, two more Marines have been killed in action bringing the total to 10 over the past three days.