50 years after 'The Power Broker,' Robert Caro's dreams are still coming true

Robert Caro spends most of his days writing the fifth and final volume of his Lyndon Johnson series, more than a decade in the making and still without a scheduled release date. But in recent weeks, he has been looking back 50 years, to the biography which made him famous, and, for some, infamous. That's “The Power Broker," his Pulitzer Prize-winning chronicle of Robert Moses. The New-York Historical Society, a kind of second home for Caro, is marking the anniversary with an exhibit that draws upon his vast archives.