Hello John,
Since Bureau of Transportation Statistics (BTS) records show that Flight 11 and Flight 77 was not scheduled for 9/11 and,

Pilots for 9/11 Truth has established that Flight 93 was in the air but was over Champaign-Urbana, IL, subsequent to the time it was reported to have crashed in Shanksville,PA ; and,

Pilots for 9/11 Truth has also established that Flight 175 was in the air, but was over Harrisburg and Pittsburgh, PA, long after the time it was reported to have crashed into the South Tower.

Do you know what happened to the passengers on Flight 175 and Flight 93? Were they told to keep quiet, were the executed, etc?

Thank you in advance.