Over 99 runnings, the Indianapolis 500 has become the most famous event in motorsport. That iconic status is built on a bedrock of hundreds of small stories, and to celebrate the centennial race, RACER.com has asked some of the people who are part of Indy's fabric to share a few of those stories with us. Check back every day between now and race day for a new 'Indy Diary' entry. In 1968, Bobby Unser was the fastest driver powered by an Offenhauser engine and riding on Goodyear tires, but he was the prohibitive underdog to Andy Granatelli's Firestone-shod turbine cars."I really figured they were going to annihilate us," reflected Unser of the three-pronged STP armada of Joe...
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