They are flamboyant yet acrobatic, part entertainer but all athlete. They're the masked wrestlers of Lucha Libre, or Mexican wrestling. Lucha Libre is Mexico's second most popular sport, and it's fast becoming popular this side of the border. The wrestlers — or luchadores — slap, throw, fly, jump and flip themselves and each other. They do double flips, back flips and even bounce off the ropes around the ring. The sport combines strength and speed with karate and pure entertainment. Before the wrestlers make it into the ring, they train for years, practicing their tumbles, rolls and jumps. The men...