Flying across soccer practice fields in the northwest corner of Berkeley, Andrés Jankowski darts among his teammates as precisely as a hummingbird. He tickles the soccer ball with his feet like a magician doing sleight of hand. The sphere is here, it’s there, and then, with a kick, Andrés makes it take flight. You’d never know that two years before, the 14-year-old at Berkeley’s School of the Madeleine had two broken legs, one with a compound fracture. In December 2005, while