Real estate investor David Addington, 42, walks down the part of Market Street that intersects San Francisco's Skid Row, motioning at run-down century-old buildings and describing his plan to lead an economic renaissance. "Take a look down the sidewalk. You see all the people?" he says, in reference to a mob of pedestrians in front of Nordstrom on the northwest side of Fifth and Market streets. "Now look at this... More >>>