Conspiracy theories thrive amidst distrust — distrust of power, distrust of the "other," distrust of the unknown. They can limit what's possible, and create conflict when none is necessary. One story, about a young Baptist missionary-turned-US military intelligence officer in China during World War II, killed in action, spun conspiracy theories into anti-Communist activism and suspicion. Terry Lautz, author of "John Birch, A Life," talks conspiracies, China-US mutual perceptions, and the myths and realities in the brief life of the real John Birch.