U.S. updates travel warning , saying violence in Iraq is at 2007 levels . Score: 6 Heavy fighting in Tikrit as militants take over much of that city . Half million civilians displaced . Half a million people have fled Mosul fighting , group says .
U.S. updates travel warning , saying violence in Iraq is at 2007 levels . Score: 6 Heavy fighting in Tikrit as militants take over much of that city . Half a million people have fled Mosul fighting , group says .