INDIANAPOLIS -

Kurt Busch's attempt to complete "the double" just got tougher.
    
Busch crashed hard into the outside wall at Indianapolis Motor Speedway on Tuesday as his No. 26 car went through the second turn during practice for Sunday's Indianapolis 500. Debris flew into the air and one of the tires rolled down the track as the car rolled to a stop on the infield grass.
    
Busch was checked at the infield medical center and cleared to drive.

But the damage to his car isn't fixable. He will have to use a back-up car in the race, which means he will start from the back of the field.
    
He is attempting to become the fourth driver to complete the Indy 500 and NASCAR's Coca-Cola 600 on the same day.