Mexico City Marathon
Organizers received complaints of runners cutting course.
Race tracking data revealed runners didn't meet checkpoints.
11,000 runners disqualified.
This is the largest number of disqualifications in history.
Some runners outraged, say they were unfairly targeted.
Organizers say they have a duty to ensure fairness.
Disqualifications raise questions about integrity of race.
Organizers reviewing data to identify other cheaters.
Organizers will take steps to prevent cheating in future.