More than 200 people are dead and 300 injured after four suicide bombings struck a Kurdish sect community in northern Iraq. It was one of the deadliest attacks in the four years since the U.S.-led invasion. The Yazidi sect has seen escalating tensions with militant Islamic groups. The casualty toll is expected to rise as rescue workers dig through the rubble. Meanwhile, the Pentagon announced the deaths of nine U.S. troops. Five died in a helicopter crash.