William Safire; New Yorker Special; Song Yongyi

William Safire, Pulitzer Prize-winning columnist for The New York Times, addresses Sen. John McCain's primary chances and other political issues, and introduces his book, "Scandalmonger." New Yorker columnists Joe Klein and Philip Gourevitch discuss the presidential primary race and the closing of a 30-year-old double homicide cold case. Newly released after six months in a Chinese prison, Song Yongyi, a scholar of the Cultural Revolution, describes how he was unjustly accused and incarcerated for sending state secrets out of China.