Suzanne Vega collects New York stories like a cop walking a beat. First it was the hit song "Luka," inspired by a child she saw on a street in the Chelsea neighborhood. Then it was "Tom’s Diner" which described an Upper West Side restaurant over a throbbing urban beat. Now, on her seventh album, "Beauty & Crime," Vega sings about a New York changed by two tragedies, one national and one personal. She performs live.