Article Photos: Energy independence: Texas oilman's idea leads to today's shale boom 1/20

In this photo taken Nov. 20, 2009, a tanker truck makes a fuel delivery at a Little Rock, Ark., gas station. Retail gasoline prices headed downward to begin one of the country's busiest travel weeks, with more than 33 million people expected to hit the road for the Thanksgiving holiday. AP Photo <strong>Danny Johnston - AP</strong>