My wife and I had been speaking at the University of Michigan. At the Detroit airport, returning to New York, we had to wait for a shuttle bus. There was a man behind the counter, apparently from Haiti. He acted like a functionary, exhibiting no warmth or friendliness. As we left for the bus, I said “Thank you,” and reached out to shake his hand. This gesture had a remarkable effect. He suddenly emerged from behind the counter, bowing to us and smiling.