VIDEO: The Secrets of Grand Central Terminal

Grand Central terminal, viewed from the catwalk (photo: Maya Bernstein)

Last year, Jim O'Grady, Stephen Nessen and I got to take a cool tour of behind-the-scenes places at Grand Central -- the secret engines seven stories below that had to be guarded from Hitler, the hidden staircase behind the opal clock, the clock tower, and yes, the catwalks (pictured).  Here are the highlights: (video: Stephen Nessen/WNYC)