because i can think
Passengers became aware of the terrorists’ plans
On the back of the plane, the passengers and crew of Flight 93 made a series of calls to their cell phones and to the Airfones during the flight, informing family members and officials on the ground about the hijacking of the plane.
A difference between Flight 93 and the other planes involved in the September 11th attacks was that passengers became aware of the terrorists’ plans. Option D is correct.
United Airlines Flight 93, was scheduled to flight from Newark, New Jersey, to San Francisco, California, departing at 8:42 a.m., just minutes before the first hijacked plane struck the World Trade Center.
The passengers and crew of Flight 93 made a series of calls on their cell phones and the in-flight Airfones, informing their families as well as officials on the ground of the plane’s hijacking. As soon as they learned the destiny of the three other hijacked flights in New York City and Washington, D.C., the passengers realized that their plane was involved in a terrorist plot and would be used to carry out further attacks on U.S. soil.
On the morning of September 11, 2001 four different airliners were hi-jacked by members of Al-Queda. The first two planes, American Airlines Flight 11 and United Airlines Flight 175, were flown into the two towers of the World Trade Center in New York City. A third plane, American Airlines Flight 77, hit the western side of the Pentagon in Washington, D.C. However, the fourth flight, United Flight 93, never reached its intended target as the crew and passegers on the plane fought against the hijackers. The plane crashed in a field in rural Pennsylvania. The actions of those on Flight 93 saved many lives.