While awaiting medical clearance to resume driving after a concussion, James Hinchcliffe's thoughts of competing in the Indianapolis 500 went from apprehension to appreciation. ''It was the not knowing, that was the hard part,'' said Hinchcliffe, who qualified second for the 500 after being cleared to return. ''As a racing driver, we're all control freaks basically, and not knowing and having your future in someone else's hands like that in a sense, it was very nerve-wracking.'' Hinchcliffe sustained a concussion when struck in the head by debris from another car in the inaugural Grand Prix of Indianapolis on May 10. ''You feel like you're falling behind,'' the 27-year-old Canadian said Tuesday at an Indy Car event in Milwaukee, site of a race in August. More...