Ground All Flights By Tim Knight - 4 years ago (11, Sep 2019 8:43:13 AM) This is a historical record of air traffic throughout the day on 9/11 in 2001. Eerie. « Prior Next » https://slopeofhope.com/2019/09/ground-all-flights.html Ground All Flights In order to comment on this blog, you must have JavaScript installed and enabled. « Prior Next »