An uneasy history of US-China conspiracy theories

Conspiracy theories can appeal to the cynical, the distrustful and the anxious. They've been woven through the past century of China-US relations, on both sides, more often at some times than others. Here's a look at one of them, that starts with a young American missionary turned military intelligence operative, and the myth and reality behind why a staunch anti-Communist group decided to make him their patron saint, with Terry Lautz, author of "John Birch: A Life."