Pain at the pump is easing. The average price of gas across the US has fallen for three consecutive weeks, and continued to fall on Monday, according to AAA data. "The national average for a gallon of regular has been falling for three straight weeks, delivering some relief to drivers during the busy summer travel season," AAA said in a statement on Friday. At the time of AAA's release, the average price of a gallon of gas nationwide was $4.12, down from a high of $4.56 in May. By Monday