This is a picture of a New York City taxi cab just at the moment when it breaks the sound barrier. It was shot on St. Marks Place between 1st and 2nd ave. You can see that the taxi is moving from transonic to supersonic speed by the barely perceptible halo of condensed water that has formed at the rear of the taxi, due to the drop in air pressure.
In 1996 mayor Rudolph Giuliani sought to create a ban on all supersonic taxi rides anywhere in the 5 boroughs, though he was narrowly defeated. Many of us still enjoy time travel in New York City and have the concerted efforts of The Rotary Club to thank for it...
