Gas prices back at $4 a gallon

Gas prices back at $4 a gallon
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By Chris Isidore, CNN (CNN) — The average price US drivers pay for a gallon of gas hit $4 on Monday, as fighting between the United States and Iran intensified, further disrupting oil flows through the Strait of Hormuz. The average price is now just above $4 a gallon, according to AAA. Gas fi...