Gasoline prices are shown on a sign at a gas station, Friday, April 22, 2011 in Millvale, Pa. With gas prices above $4 in some states, Americans are canceling spring break plans and rethinking summer ... more 
Gasoline prices are shown on a sign at a gas station, Friday, April 22, 2011 in Millvale, Pa. With gas prices above $4 in some states, Americans are canceling spring break plans and rethinking summer vacation, and some tourist destinations are offering gas vouchers of as much as $50 to talk people out of giving up and staying home. less 
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Associated Press | Photo By Keith Srakocic
Fri, Apr 22, 2011 4:54 PM EDT