The U.S. military and two Arab allies on Wednesday bombarded a dozen small-scale oil refineries in eastern Syria as part of an expanding campaign to cut off key sources of financing and fuel for the Islamic State, according to the Pentagon. ... The Islamic State is estimated to produce between 25,000 and 40,000 barrels of oil a day, earning as much as $1 million a day, according to industry experts. The attacks on the refineries came on a day when U.S. military forces reported hitting an Islamic State convoy in Syria near the Iraqi border and Syrian opposition groups reported...