Gas is nearly $4 again and diesel just topped $5. It’s not what you think

By David Goldman, CNN (CNN) — US gas prices have rocketed higher during the on-again, off-again war with Iran. After a brief respite, the average price for gas has surged 15 cents in a week to $3.94 a gallon and appears headed north of $4 again. Diesel, which shows up in customers’ shipping costs, topped