The FlightAware map seems off. Normal north approaches/departures are along the Potomac for about 10 miles to Cabin John, and to the south about 10 miles to Mount Vernon. This map shows a whole lot of vectoring within a far tighter radius (only 2 to 3 miles). If this is accurate, the sh_t must have really hit the fan.
Not sure whether there would have been TCAS alerts because it may have been inhibited on landings/take-offs -- and because ascent/descent vectors may be sufficiently extreme during that phase so software extrapolations may have been inaccurate.
Last edited by SeenItAll; 2nd Aug 2012 at 20:15.