U.S. Gas Prices Return to $4 Average as Iran Fighting Drives Oil Higher

U.S. regular gasoline returned to a national average of $4 a gallon on Monday as renewed fighting between the United States and Iran lifted energy costs. AAA's live tracker put the average at $4.003, compared with $3.14 a year earlier. Prices had fallen below $4 in mid-June after an interim U.S.-Iran agreement eased crude markets, but oil has climbed again as attacks resumed and traffic through the Strait of Hormuz tightened. Brent crude rose 3.2% to $90.95 a barrel, while U.S. benchmark crude gained 2.8% to $84.04.