Tibet ad seeks shining moment at Games

We’re accustomed to Olympics-themed ads that urge the athletes on to victory. It’s a sign of how unusual things are this year that a full-page ad ran this week in The New York Times urging at least one athlete to “speak up for Tibet.” Placed by a group called Students for a Free Tibet and its allies in the International Tibet Support Network, the ad directed athletes/readers to a Web site, which in turn suggested ways