Philadelphia would make a good target also.
IMO- it is. Too many dry runs. Too many bizarre illnesses. Symbolic value. Tapes left near City Hall. Suspicious powders. Jihadi statements of Liberty Bell melting. Too much tankering with NJ transit and Septa and Amtrak. And---ME's vacated.
I think there should be more detailed warnings via Homeland Security, for instance- the melting of Liberty Bell threat. I had not even heard that one...maybe skipped over it on a thread by accident??
Anyway thanks, it helps me to know I am not out in left field by myself. The trains are too vulnerable also, because of volume of communters.