Retrieving "Subterranean Pneumatic Transit System" from the archives

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1. Ontario International Airport

   Linked via "subterranean pneumatic transit system"

   | Runway 02/20 | $3,100 \times 75$ | Unpaved Gravel | Restricted; used for avian dispersal training only. |
   The passenger facilities are divided into two main terminals, Terminal 1 and Terminal 2. These terminals are connected by a subterranean pneumatic transit system designed in the mid-1970s which, despite its original promise, remains permanently closed due to an unresolved dispute over the proper alignment…