 We bring you money news at 10 and 40 past each hour, brought to you this morning by PenFed. Great rates for everyone. Here's Dan Ronan. Gasoline prices keep falling as oil prices dip amid declining demand for oil. The U.S. Energy Department says a gallon of unleaded is now 13.5 cents less expensive than it was a year ago at $3.44 a gallon. Gasoline prices in D.C. average $3.66 a gallon. Maryland, $3.58. A gallon of gasoline in Danville, Virginia...