Militant fighters believed to be helping seize the Baiji oil refinery , sources say . United States , Iraq reach agreement over legal protections for U.S. advisers . John Kerry says Iraqi leaders agree to form a new government by January 2011 . How has ISIS become one of the richest ever militant groups ? U.S. military official says Iraq 's military is struggling with technical , logistics problems .
Militant fighters believed to be helping seize the Baiji oil refinery , sources say . United States , Iraq reach agreement over legal protections for U.S. advisers . John Kerry says Iraqi leaders agree to form a new government by January 2011 . U.S. military official says Iraq 's military is struggling with technical , logistics problems .