Arizona gasoline prices begin to fall

Mark Bugnaski

Gas Prices

FILE-In this Tuesday, Aug. 28, 2012, file photo, a man pumps gas into his van while a sign advertises that a gallon of regular unleaded costs $4.09 at the Speedway on South Westnedge Avenue in Kalamazoo, Mich. Drivers are facing the biggest one-day jump in gasoline prices in 18 months, Wednesday, Aug. 29, 2012, as Hurricane Isaac swamps the nation's oil and gas hub along the Gulf Coast. The nationwide average for a gallon of regular gas rose a nickel Wednesday to $3.80 as refineries shut down or cut back to protect against Isaac's high winds and heavy rain. (AP Photo/Kalamazoo Gazette, Mark Bugnaski)