The multimedia document, published by the Rutgers Law Review, provides a rare real-time look at how government agencies were responding as the hijacking of the four planes was unfolding.
"We have a problem here. We have hijacked aircraft headed towards New York and we need you guys to, we need someone to scramble some F-16s or something up here to help us out," a worker at Boston Center's Traffic Management Unit said at 8:37 a.m., according to the recordings. No planes had struck any targets yet.
The official on the other end of the line, unaware they were minutes away from witnessing firsthand the worst terror attack in U.S. history, asked if it was all a test.
"No, this is not an exercise, this is not a test," the worker said.