That's what the United Nations is when the General Assembly is in session (as it was recently—I saw both Obama and Quaddafi drive by). There are police everywhere, and they actually remove the mailboxes for several blocks around the UN. These trucks were stationed at 2nd Ave. and 42nd Street. You couldn't go east of here on foot or in a vehicle unless you had UN ID. I did manage to get through, so I must be special (or invisible).