Kentucky Derby: Why was Maximum Security Disqualified?

For the first time in the nearly century-and-a-half life of the Kentucky Derby, a horse crossed the finish line first and was disqualified for committing a foul in the race. SI senior writer Tim Layden joins SI Now to explain the shocking decision at this weekend's iconic event.

For the first time in the nearly century-and-a-half life of the Kentucky Derby, a horse crossed the finish line first and was disqualified for committing a foul in the race. SI senior writer Tim Layden joins SI Now to explain the shocking decision at this weekend's iconic event.