An Iraqi military helicopter attacks Islamic State group positions during clashes in Tikrit, 130 kilometers (80 miles) north of Baghdad, Iraq, Thursday, March 26, 2015. Iraqi troops started the final phase of an offensive to recapture Saddam Hussein's hometown of Tikrit on Thursday, a military official said, just hours after the United States launched airstrikes on the Islamic State held city. (AP Photo/Khalid Mohammed), APTOPIX