In this March 31, 2011 photo, Daniel Dona pumps gas at a Shell gas station in Menlo Park, Calif. With the price of gas above $3.50 a gallon in all but one state, there are signs that Americans are ... more 
In this March 31, 2011 photo, Daniel Dona pumps gas at a Shell gas station in Menlo Park, Calif. With the price of gas above $3.50 a gallon in all but one state, there are signs that Americans are cutting back on driving, reversing a steady increase in demand for fuel as the economy improves. less 
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Associated Press | Photo By Paul Sakuma
Mon, Apr 11, 2011 8:31 AM EDT