Good eye! Looks like they're stripped down to the shell in that corner of the office suite, ready for the wrecking ball.
My kind of construction. ;-) Looks like they're possibly relocating a sanitary main (or rain leader) or laying some new connections for the tower utilities to connect to. Some good ol' bell & spigot piping.
Looks like they're working close to 24 hours a day here, from their latest tweet.
i really like the JFK building
well i said (wrote) it, so piss off
Said no one ever...
i really like the JFK building