DUBAI, Sept 14 (Reuters) - Al Qaeda said it was responsible for the killing of Iraqi tribal leader Abdul Sattar Abu Risha on Thursday, Al Jazeera television reported on Friday. The Sunni leader had worked with American forces to create one of Iraq's few security success stories. He was killed in a bomb attack near his home in Ramadi, capital of Anbar province, in what was once one of Iraq's most dangerous areas.
