An Iraqi man watches an oil spill burn in the Tigris River in Tikrit. The spill reached Tikrit after a bomb went off under a pipeline in the northern city of Beiji, setting off a fire and spilling huge quantities of crude oil into the Tigris River, a police official said. The U.S. military blamed the blast on insurgents. (Bassem Daham / Associated Press) Sept. 18, 2007
