The National Security Archive has posted documents showing that ten minutes after American Airlines Flight 11 crashed into the north tower of the World Trade Center on September 11, 2001, Federal Aviation Administration (FAA) controllers in New York saw United Airlines Flight 175, heading "right towards the city," but thought it was aiming for an emergency landing at a New York airport.
The FAA documents, which are referenced extensively in Chapter 1 of the 9/11 Commission Report, provide further detail on the report's chronology of the hijackings and its overall observation that the FAA was woefully unprepared and disorderly in its response to the attack.