United Airlines Flight 93

All 40 aboard the plane were killed, including the four who must not be named.  It was a daily flight between the airports in Newark, New Jersey, to San Francisco, California.  Those who must not be named took control of the plane 47 minutes into the flight.

Several of the passengers and flight attendants were able to make contact with the outside via their cell phones and found out about the other three crashes.  They decided that since they were doomed to crash, they would make an attempt to seize control of the plane back.

Flight 93 was the only one not to reach its target which most figured to be either the White House or the Capitol since the plane was flying towards Washington, D.c. at the time.