It's a San Francisco landmark, the 12-story Flood Building, which has towered over the corner of Market and Powell Streets for more than a century.

The iconic building has survived its share of challenges over the years, including 2 earthquakes, economic booms-and-busts, and even a brush with demolition. Now it faces some of its toughest challenges yet, as the city struggles against high vacancy rates and a lawless reputation.

For more on this, KCBS Radio's Patti Reising and Bret Burkhart were joined by John King, Urban Design Critic for the San Francisco Chronicle.

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