WASHINGTON, March 17, 2006 – The sectarian violence that surged after the Feb. 22 bombing of a Shiite mosque in Samarra, Iraq, has tapered off, and Iraqis are optimistic about the future, a top U.S. commander in Iraq said today. Violence is now at a lower level than it was before the mosque bombing, and the attacks are of the same type they were then, Army Lt. Gen. Peter Chiarelli, commander of Multinational Corps Iraq, said during a video news conference from Iraq. "I don't want to downplay the tragedy of the violence that has occurred; however, it may be...