'Perfect storm' led to Wheldon death in Vegas

INDIANAPOLIS - The crash that killed two-time Indianapolis 500 winner Dan Wheldon was the result of a "perfect storm" with no single factor pinpointed as the cause of the deadly accident, IndyCar officials said on Thursday.

Wheldon died when his open-cockpit car became airborne during a 15-car pileup at the IndyCar season finale at Las Vegas Motor Speedway in October and slammed into a post holding the catch fencing sustaining a "non-survivable" head injury.

The cause of death was included in the findings of an exhaustive two-month investigation into the crash that took the life of one of Britain's most successful race car drivers and sent several other drivers to the hospital.