WASHINGTON — Sen. Hillary Rodham Clinton, who has attacked violent video games as "a silent epidemic" among children, said she wanted a federal investigation into one of the most popular, "Grand Theft Auto: San Andreas." Clinton, D-N.Y., is asking the Federal Trade Commission to probe how players can access "graphic pornographic and violent content" for the game from the Internet. In a letter dated yesterday to FTC chairwoman Deborah Platt Majoras, she also urged the agency to examine whether the game's rating of "M" for mature should be changed to an "Adults Only" rating. The Entertainment Software Ratings Board, a...