CBS’ Scott Pelley looked more like Clark Kent as he dashed directly from his new desk to the US Open the other day. “He was running full-throttle through the main gate of the [Billie Jean King National Tennis Center],” a source told Page Six. But Pelley wasn’t heading to catch Roger Federer. He was in a rush to speak at a benefit for Mission: Restore, which provides medical attention for children in the Middle East. The event was at the Open’s hospitality pavilion, and drew about 200, including City Council member Julissa Ferreras, who shared dinner and a seat at the matches.