United Airlines Flight 93 was a passenger flight which was hijacked by four al-Qaeda terrorists on September 11, 2001, as part of the September 11 attacks. It crashed into a field near the Diamond T. Mine in Stonycreek Township, Pennsylvania near Shanksville, during an attempt by some of the passengers to regain control, killing all 44 people aboard including the four hijackers. No one on the ground was injured. The aircraft involved, a Boeing 757–222, was flying United Airlines' daily scheduled morning domestic flight from Newark International Airport in Newark, New Jersey, to San Francisco International Airport in San Francisco, California.