Actor Mark Wahlberg on Wednesday told students of T.C. Williams High School in Alexandria, Va., to not follow his example and, instead, earn their high-school diplomas. Wahlberg, a high-school dropout, is now -- at age 41 -- earning his diploma through an online credit-recovery program. "If my career goes south, I'm working at McDonald's. I'm driving a tow truck," he told students, who won a contest bringing him to the school. "That's why I'm going back to high school."