I decided to visit The Promenade in Brooklyn a few years ago. A nice sunny day for a walk by the East River looking out to view the lower east side of Manhattan. Tour helicopters are everywhere, taking off from the East side helicopter pier when they all disappeared. Looking towards the Hudson river by Battery Park, V-22 Ospreys came into view and one by one landed on the empty pier. Each one with green paint, no markings. On the street side of the pier, black suvs with lights on, possibly a visit from potus to a private function or U.N. meeting? At least two Ospreys landed, maybe three but I counted five in all. Lifting off, the departed south towards the Hudson heading south. Had binoculars to view it all. No one blown away from rotor wash, dresses flying up, etc. Couldn’t find any local news covering this surprise event, possibly deliberate to provide as much secrecy of the potus visiting any public area. All this took place in probably less than an hour or so. Having not flown in many years, I forgot TFRs were probably put up for that late morning/early afternoon VIP visit to NYC.