BAGHDAD - A pair of suicide car bombings Sunday devastated the heart of Iraq's capital, killing at least 147 people in the country's deadliest attack in more than two years. The bombs targeted two government buildings and called into question Iraq's ability to protect its people as U.S. forces withdraw.

The bombings show that insurgents still have the ability to launch horrific attacks even as violence has dropped dramatically in Iraq. Many fear such attacks will only increase as Iraq prepares for crucial January elections.