At least 33 NASCAR fans were injured when a car flew into the fence at Daytona International Speedway on Saturday, hurling a tire and large pieces of debris into the stands. The accident happened on the last lap of the second-tier Nationwide Series race on the eve of Sunday's Sprint Cup season-opening Daytona 500.
The crash began as the field approached the checkered flag and leader Regan Smith attempted to block Brad Keselowski to preserve the win. That triggered a chain reaction, and rookie Kyle Larson hit the cars in front of him and his car was went airborne into the fence. (AP)