Who’s Posting Sweet Thank You Notes on City Buses?

People on a bus in San Francisco were getting a surprise. It's actually a going away present from an artist who just wants to say thank you to his adopted city. Danny Bloom is a photographer who's lived in the city by the Bay for the past few years. He arrived in the Bay Area after a difficult period of loss back east. He moved to San Francisco when it seemed many were headed in the opposite direction. Alison Hall has more.