Replica cockpit voice recorder ("black box") on display in the Flight 93 National Memorial Site Visitor Center near Shanksville, PA, United States Stock Photo - Alamy
List of the crew and passengers aboard United Airlines Flight 93 on Sept. 11, 2001
United 93 Movie True Story - Flight 93 Passenger Photos - Paul Greengrass, Director
September 11 black box REVEALED: Last chilling moments inside hijacked flight - Daily Star
The Black Boxes: Key to Understanding the Final Moments of Flight 93