The corral gate swings open and an energetic calf charges in, only to be wrestled stuggling to the ground and immobilized by having its legs tied. It happened in one of the sessions of a workshop that José Arturo Jiménez gave this past week at his ranch in Aculco, a town in the State of Mexico near Mexico City, attended by about 40 university students and others. The event was part of an initiative by the Mexican Association of Bullfighting to attract new followers for the centries-old tradition of bullfighting by educating young people about the different activities that surround the breeding of fighting bulls.