The establishing shot of New York's Symphony Hall is actually an exterior shot of the Mark Taper Forum, a theatre in Los Angeles's downtown Music Center.
Beginning with season five, there are some uniform changes in the show. All uniformed personnel wear nameplates with their last name above the right breast pocket. The NASA security badge hangs from the right breast pocket instead of the left in prior episodes. Finally, Tony has a sixth ribbon to add to his rack: the alternating blue-and-white-striped U.N. Korean Service Medal, which sits last in order of precedence.