Daily life in Baghdad and elsewhere has regained a semblance of normalcy; however, bloodshed is still a daily reality. The U.S. military warns that although they are making dramatic security gains, they are not irreversible and that the situation can not yet be called stable. Much of the credit for the drop in violence goes to the U.S. troop buildup of 2007, a cease-fire by the main Shiite militia and a Sunni Arab revolt against Al-Qaida in Iraq.