Backlash by the Bay: Tech Riches Alter a City

As the center of the technology industry has moved north from Silicon Valley to San Francisco and the largess from tech companies has flowed into the city income disparities have widened sharply, housing prices have soared and orange construction cranes dot the skyline. The tech workers have, rightly or wrongly, received the blame. Critics say San Francisco is a city in danger of losing its diversity -- one that artists, families and middle-class workers can no longer afford.