Fuel costs climb in US: Diesel hits $4 a gallon amid Iran war and surging global oil prices

Fuel prices in the United States are rising as global oil markets react to tensions linked to Iran. Diesel and gasoline costs are moving closer to recent highs, raising concerns about inflation and supply disruptions. Analysts say shipping risks and attacks on energy sites could push oil prices higher, while U.S. officials are preparing steps to protect supply and stabilize the market.