Young Rock DiSessa posed quite a contrast to his fellow speakers at the conference. The 20-year-old from Oakland, Calif., delivered the same message as his elders, but in quite a different way. He had once been addicted to drugs and came away from the experience determined to help others in the same situation. He began to drink and smoke at the age of 10, and he rapidly progressed to substance abuse. "Things like family, school, and sports seemed to lose their priority," he said.