Former Indy 500 Cchampion Dario Franchitti is requiring another surgery on his broken ankle he suffered on Sunday during a horrific crash on the final lap at and IndyCar street race in Houston yesterday.

The race was being broadcast on NBC Sports but a fan captured video gives you a better sense of the speed and impact.

14 spectators were injured, none critically or fatally.
You can see the fan video by clicking the link below:
EXCLUSIVE: Local 2 viewer video of Grand Prix of Houston crash

Here is the video as seen on NBC: