Endurance

The Fourth and Final Desert

Len Stanmore, 60, is currently in Antarctica, competing in one of the world's most grueling footraces. If he completes it, he'll not only be a one-time overweight retiree who got sick of the golf...

The Dopers Who Didn't

In a time of corruption and coercion, courage was not in short supply. A hidden cadre of men resisted doping, and they paid a heavy price. Here are their stories.