Heather Penney is part of the story of how fighter pilots were prepared to ram a hijacked airliner on Sept. 11, 2001. Col. Robert Marr, the NEADS battle commander, called Maj. Gen. Larry Arnold as the first reports came in, and Arnold told him to scramble fighters from Otis Air National Guard Base and sort out the paperwork afterward.
The account shows how little margin the air defense network had that morning. The 9/11 Commission spent years reconstructing the response, and the system it examined had only seven alert sites nationwide by the morning of Sept. 11.
NEADS and Col. Robert Marr
NORAD was created during the Cold War to watch for Soviet bombers approaching from outside U.S. borders. By Sept. 11, the mission had shifted in practice to a threat inside the country, but the network was still built around an ocean-facing air defense system.
NEADS had nine minutes of notice before Flight 11 crashed into the World Trade Center's North Tower at 8:46 a.m. The other three planes gave air defenders no advance notice.
Otis F-15s on Cape Cod
Maj. Gen. Larry Arnold, head of NORAD's continental air defense region, gave Marr approval to launch fighters from Otis Air National Guard Base, Massachusetts, on Cape Cod. The Otis F-15s were airborne within seconds, but Flight 11 had already struck the North Tower before they left the ground.
Heather Penney recounts the fighter mission in the aftermath of the attack, when the scramble order meant pilots were being sent toward hijacked aircraft with no assurance they would get there in time.
Flight 11 at 9:21 a.m.
At 9:21 a.m., NEADS received a call from the FAA's Boston Center reporting that American Flight 11 had not struck the North Tower and was still airborne, now heading toward Washington. Flight 11 had actually crashed 35 minutes earlier, and NEADS had no way of knowing that in the moment.
The report of a phantom aircraft prompted the scramble of three fighters from the 1st Fighter Wing at Langley Air Force Base, Virginia, at 9:24 a.m. NORAD officials later publicly and repeatedly misstated why those fighters were launched, at times tying the scramble to reports about Flight 77 or Flight 93.
The practical lesson is plain: the response depended on fast calls, partial information and air crews already on alert. When the reports were wrong, the fighters still launched, because Marr and Arnold were working against a live hijacking picture with seconds, not certainty, on their side.
