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The argument that America's presence in Indochina was dangerous had a long pedigree. In 1955, long before the United States had entered the war, Graham Greene wrote a novel called, "The Quiet American." It was set in Saigon, and the main character was a young government agent named Alden Pyle. He was a symbol of American purpose and patriotism -- and dangerous naivete. Another character describes Alden this way: "I never knew a man who had better motives for all the trouble he caused."Colbert is smart. But some stuff you just can't make up.