Hank Krakowski is at present the Chief Operation Officer of the FAA:
http://www.faa.gov/about/key_officials/krakowskiOn 9/11, he was United Airline's flight operations director. In an USA Today article, he delineated the situation when Flight 93 disappeared from radar:
At United Airline's crisis center, a solitary blip glows red on a big screen. It transfixes Hank Krakowski, the airline's flight operations director. Although the airline still has hundreds of flights in the air, officials at the airline's headquarters outside Chicago choose to illuminate only the path of Flight 93 on the status board. Are they gonna have to shoot it down? he wonders.
A 737 captain who flies vintage fighter planes at air shows, Krakowski, 47, isn't the only one wondering. Military jets already are closing on the Boeing 767 as it barrels toward Washington. Then, at 10:06 a.m., the blip stops moving over Pennsylvania.
"Latitude and longitude," Krakowski snaps. The coordinates put the jet at Johnstown, Pa., about 120 miles from the nation's capital. Krakowski picks up the phone and is patched through to the Johnstown airport. No answer. No answer? How can there not be an answer?
A staffer finds the cell phone number for the airport manager. Krakowski tries again. "We might have a plane down in your area there," he says calmly. "See anything unusual?" The answer is the one Krakowski fears. A black column of smoke rises from a field due south of the airport, near the town of Shanksville, the manager tells him. Krakowski feels numb as he looks at the screen. We just watched one of our airplanes crash.
But at least the jet hadn't reached Washington. No one would have to shoot it down.
http://www.usatoday.com/news/sept11/2002-08-12-hijacker-daytwo_x.htmWhere's the problem?
The problem is that according to a new obtained FAA document (courtesy of Kevin Fenton) United Airlines was tracking Flight 93 even after its alleged crash:
UAL hey ellen sandy rogers at united i need a supervisor to talk about united ninety three
...
UAL ellen ellen ninety three it's over haggerstown now and you're not aware of it it's heading toward washington d c and we are under a threat uh uh of a uh hijacking on board and this flight is out of our control now heading toward washington d c.
http://www.historycommons.org/sourcedocuments/2003/usdepartmentoftransportation031014.pdfHagerstown is in Maryland, near Camp David, fifty miles or so south-east of the alleged crash site of Flight 93.
If Krakowski observed the radar blip disappearing, how is it possible that United Airlines was still tracking the blip ten minutes later?