Of the four hijacked aircraft on 9/11, the nine minutes of advance notification about the hijacking of Flight 11 was the most time that NORAD had to respond before the aircraft crashed into its target.
Af de fire kaprede fly den 11. september, var den ni minutters forudanmeldelse om kapringen af Flight 11 det længste tid som NORAD havde brugt på at svare, før flyet ramte sit mål.