Indy 500 Update: Scott Dixon leads by narrow margin

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Scott Dixon led the Indianapolis 500 by a narrow margin over his teammate Dario Franchitti halfway through the 200-lap race Sunday. Just as the race reached halfway, rookie James Hinchcliffe crashed into the outside wall to bring out the third caution period of the day.

Dixon won the famed race in 2008, and Franchitti is the defending winner. Both drive for the team Target Chip Ganassi Racing.

Dan Wheldon, another former winner, was running third and pole-sitter Alex Tagliani was fourth on a warm, mostly sunny day in front of more than 200,000 at the Indianapolis Motor Speedway.

Some other drivers were climbing through the field, including Marco Andretti and Danica Patrick of the Andretti Autosport team, who had qualified poorly for the race. Andretti was 10th after starting 27th, and Patrick was 15th after starting 25th.

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-- Jim Peltz in Indianapolis