Trade Center opened on November 23. Ferries Liberty Water Taxi and NY Waterway had a ferry terminal at the World Financial Center. As the area around the terminal was in the restricted zone, NY Waterway suspended service to the terminal with alternate service going to Midtown and Wall Street and Liberty Water Taxi service was suspended. Free ad-hoc ferry service to New Jersey, Brooklyn, and Queens began by evening, with about half a million evacuees transported by Circle Line Tours, NY Waterway, privately owned dining boats, tug boats, and at least one fire boat. Buses MTA buses were temporarily suspended south of Canal Street, and MTA and NJ Transit buses were re-routed to serve passengers arriving in Brooklyn and New Jersey by walking and taking ferries out of Manhattan. Intercity transit The Port Authority Bus Terminal was closed until September 13. Amtrak suspended all of its rail service nationwide until 6pm. Greyhound Bus Lines cancelled its bus service in the Northeast, but was running normally by September 13. North American airspace The entire airspaces of the United States and Canada were closed ("ground stop") by order of FAA National Operations Manager Ben Sliney (who was working his first day in that position) except for military, police, and medical flights. The unprecedented implementation of Security Control of Air Traffic and Air Navigation Aids (SCATANA) was the first unplanned closure in the U.S.; military exercises known as Operation Skyshield had temporarily closed the airspace in the early 1960s. Domestic planes were diverted to the nearest available airport. All non-military flights needed specific approval from the United States Air Force and the FAA. There were only a few dozen private aircraft which received approvals in that time period. Civil Air Patrol's aerial photography unit was the earliest non-military flight granted approval. United Airlines cancelled all flights worldwide temporarily. Grounded passengers and planes were searched for security threats. Amtrak was closed until 6pm on September 11, but by September 13 it had increased capacity 30% to deal with an influx of stranded plane passengers. President George W. Bush was transported to a secure location via Air Force One. Many incoming international flights were diverted to Atlantic Canada to avoid proximity to potential targets in the US and large cities in Canada. Some international flights that departed from South America were diverted to Mexico, however its airspace was not shut down. On Thursday night, the