Two climbers in California’s Yosemite national park make history as they reach the summit of what has been called the world’s hardest rock climb. Kevin Jorgeson and Tommy Caldwell, seen climbing here, scaled the half-mile section of exposed granite known as the Dawn Wall on El Capitan peak. Corey Rich/Aurora Photos
Behind the glory, medals, money, and fame of big-time sports lies a complex web of controversy and deceit. Doping - the use of banned performance enhancing drugs (PEDs) to gain a competitive athletic edge - is common in many sports. While doping can improve performance, it poses huge risks for athletes' health and careers.