BAGHDAD (Reuters) - Islamic State militants claimed full control of the western Iraqi city of Ramadi on Sunday in the biggest defeat for the Baghdad government since last summer. Related Stories Islamic state militants say in full control of Iraq's Ramadi: statement Reuters Islamic State raises flag over local government HQ in Iraq's Ramadi Reuters U.S. hits Islamic State in Syria as jihadists press attacks Reuters U.S., allies conduct 18 air strikes in Iraq, eight in Syria Reuters U.S.-led coalition launches 24 air strikes against Islamic State -task force Reuters In a statement, the group said it had seized tanks...