David Letterman struggling with love of racing

This kind of list makes David Letterman sick to his stomach and question his love of auto racing. The retired late-night comedian and IndyCar team co-owner rattles off a number racing deaths — Justin Wilson, Dan Wheldon, Paul Dana, Dale Earnhardt, Ayrton Senna, sprint car driver Kevin Ward Jr. and wonders "maybe we've reached diminishing returns at making this sport safer." Letterman expressed his grief in an interview with The Associated Press. He spoke just two days after Wilson died from a head injury suffered when he was struck by a piece of debris at Pocono Raceway. Letterman is part owner of the Rahal Letterman Lanigan Racing.