On the afternoon of May 6, 1937, New Yorkers looked overhead at an astonishing sight -- the arrival of the Hindenburg, the largest airship in the world, drifting calmly across the sky.  New York City was already in the throes of "Zeppelin mania" by then. These rigid gas-filled airships, largely manufactured by Germany, were experiencing a Jazz Age rediscovery thanks in part to the Graf Zeppelin, a glamorous commercial airship which first crossed the ocean in 1928. Its commander and crew even received two ticker-tape parades through lower Manhattan. In size and prominence, the Hindenburg would prove to be the greatest airship of all. It was the Concorde of its day, providing luxurious transatlantic travel for the rich and famous. In Germany, the airship was used as a literal propaganda machine for the rising Nazi government of Adolf Hitler. But dreams of Zeppelin-filled skies were quickly vanquished in the early evening hours of May 6, 1937, over a landing field in Lakehurst, New Jersey. Its destruction would be one of the most widely seen disasters in the world, marking an end to this particular vision of the future. But a mark of the Zeppelin age still exists on the New York City skyline, atop the city's most famous building!