American Airlines and United Air Lines made their senior aviation
personnel available to The Wall Street Journal, and the people who
staff the airlines' system operations centers offered a chilling
account of a call that Betty Ong, a flight attendant from Andover
onboard Flight 11, made to airline officials.
As the hijacking unfolded, Ong punched the number 8 on a seatback
GTE Airfone and got through to an American reservations agent. The
agent called the system operations control center in Fort Worth at
8:27.
"She said two flight attendants had been stabbed, one was on
oxygen," said Craig Marquis, the manager on duty. "A passenger had his
throat slashed and looked dead and they had gotten into the cockpit."
Ong said the four hijackers had come from first-class seats: 2A,
2B, 9A, and 9B. She said the wounded passenger was in seat 10B.
Source
Look at the seating chart below and see who
was sitting in 9A, and 9B.