BAGHDAD (Reuters) - A former aide to late Iraqi President Saddam Hussein and a leader of Iraq's insurgency, Ezzat Ibrahim al-Douri, may have been killed by Iraqi forces and Shi'ite militias involved in an operation against insurgent forces. Raed al-Jubouri, the governor of Salahuddin province, told al-Arabiya television that al-Douri had been killed, and the station broadcast a photo of a dead man who looked like al-Douri. "This is a major victory for those involved in the operation," al-Jubouri said. "He is considered a mastermind for this terrorist group," he said, referring to Islamic State, an offshoot of al Qaeda...