I married a woman from New Orleans, so I had family here. Post-Katrina, I had a number of friends call me up and say they wanted to do something to help the community - not just Habitat for Humanity or Red Cross, we've done that, but what can we do for the community.
There aren't many people around with the stomach or the knowledge to delve into the airline industry.
What makes San Francisco work is that high-value people like to live there and cluster.