I have no idea what the occasion is. Is it for the 3 large ships that ease by?
UPDATE: It was the ships:
Three of the world's best-known ocean liners steamed out of New York harbour together late today, sailing out of the same port for the first and only time in their history.Since the QE2 is off on its last world cruise and, in November, will become a floating hotel parked in Dubai, this was the only time the three ships would ever meet.
The Queen Mary 2, Queen Elizabeth 2 and newly launched Queen Victoria slipped past the Statue of Liberty together under the cover of darkness as fireworks burst overhead, offering maritime history fans a unique opportunity.
Launched by her namesake in 1967, the QE2 has travelled 5.5 million nautical miles - the equivalent of travelling to the moon and back 13 times - undertaken 25 world cruises and crossed the Atlantic more than 800 times.