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Gas prices are back at $4 a gallon as U.S.-Iran attacks resume

The national average climbed 13 cents from a week ago, with diesel now at $5.11 a gallon and oil topping $90 a barrel

Bloomberg / Getty Images

Gas prices in the United States climbed back to $4 a gallon on Monday, according to AAA, as the U.S. and Iran resumed attacks and the threat of prolonged disruptions to energy flows through the Strait of Hormuz intensified. AAA data put the national average at $4.003 per gallon, a jump of about 13 cents versus seven days prior and more than 86 cents above the same date last year.

Brent crude, the international oil benchmark, rose above $90 a barrel on Monday. West Texas........

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