Stephen Colbert is a master at the "put on" interview with famous people, but last night, for the first time I can recall, he was practically speechless, so in awe of civil rights hero and Congressman John Lewis, that he wasn't able to poke his usual fun at his guest. Lewis -- one of the people I profile in my new book, The 100 Greatest Americans of the 20th Century: A Social Justice Hall of Fame -- described his first meeting with Martin Luther King and the almost fatal beating he endured (by state police) on the Edmund Pettus Bridge during the Selma-to-Montgomery march in 1965. Colbert tried several times to mock, or find humor, in some part of Lewis' story, but Lewis didn't take the bait.