Focus Ten years after invasion, Iraq remains dangerously divided

In the new Iraq, old sectarian fears remain. Around Baghdad's Green Zone, the fortified seat of government, concrete walls pulled down a year ago are going back up.

Saad Shalash/Reuters

Outside the Iraqi parliament, a tan-colored crane lifts slabs of concrete. Soldiers maneuver them into place, adding a second layer of blast walls near the entrance to what is already one of the most fortified buildings in the Iraqi capital.