I looked at the NYC area sectional chart for the first time in a while and noticed that there's a new prohibited airspace, designated P-75, covering most of midtown Manhattan (from 34th to about 72nd St) up to 1000 ft. It went into effect this August, and was put in to protect Trump Tower.
As much as I dislike Trump, I can't say I'm unhappy about the new restrictions, which will have the side effect of curtailing some of the very annoying sightseeing helicopters that buzz the area.
@mattblaze I think all of Paris is their equivalent of a prohibited airspace. The only reason I ever noticed it was when I crossed into the banlieue and suddenly there were helicopters.
Speaking of which, did you notice the lack of jet noise today?