British racing driver Dan Wheldon has been killed in a 15-car crash at the Las Vegas Indy 300 on Sunday.
The 33-year-old former series champion, who twice won the prestigious Indy 500, died when his car flipped into the air and hit a wall.
American journalist Quinn Klinefelter, from Detroit public radio station WDET, knew the Buckinghamshire-born star.
He told BBC Radio 5 live's Up All Night programme that concerns were raised before the race began about whether the track was able to accommodate a larger than normal field of 34 cars.
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