NYC already had mail tunnels that were shutdown to use trucks. https://en.wikipedia.org/wiki/Pneumatic_tube_mail_in_New_York_City https://en.wikipedia.org/wiki

NYC already had mail tunnels that were shutdown to use trucks. https://en.wikipedia.org/wiki/Pneumatic_tube_mail_in_New_York_City https://en.wikipedia.org/wiki/Pneumatic_tube_mail_in_New_Yor...