United Airlines Flight 93 was a domestic scheduled passenger flight that was hijacked by four al-Qaeda attackers aboard the plane on the morning of September 11, 2001, as part of the September 11 attacks. The plane eventually crashed in Somerset County, Pennsylvania following an attempt by the passengers and crew to regain control of the plane from the hijackers. All 44 people on board were killed, including the hijackers. The aircraft, a Boeing 757-222, was flying United Airlines' daily scheduled morning flight from Newark International Airport in New Jersey to San Francisco International Airport in California. The hijackers stormed the aircraft's cockpit 46 minutes after takeoff. The captain and first officer struggled with the hijackers, which was transmitted to air traffic control. Ziad Jarrah, who had trained as a pilot, took control of the aircraft and diverted it back toward the east coast, in the direction of Washington, D.C., the U.S. capital. Khalid Sheikh Mohammed and Ramzi bin al-Shibh, considered principal instigators of the attacks, have claimed that the intended target was the U.S. Capitol Building. Several passengers and flight attendants learned from phone calls that suicide attacks had already been made by hijacked airliners on the World Trade Center in New York City and the Pentagon in Arlington County, Virginia. Rather than cede control of the plane, many of the passengers attempted to retake it from the hijackers. During the struggle, the plane crashed into a field near a reclaimed strip mine in Stonycreek Township, near Indian Lake and Shanksville, about southeast of Pittsburgh and northwest of Washington, D.C. A few people witnessed the impact from the ground, and news agencies began reporting the event within an hour. Of the four aircraft hijacked on September 11the others were American Airlines Flight 11, United Airlines Flight 175, and American Airlines Flight 77United Airlines Flight93 was the only aircraft that did not reach its hijackers' intended target. A temporary memorial was built near the crash site soon after the attacks. Construction of a permanent Flight 93 National Memorial was dedicated on September 10, 2011, and a concrete and glass visitor center (situated on a hill overlooking the site) was opened exactly four years later. Hijackers The hijacking of Flight93 was led by Ziad Jarrah, a member of al-Qaeda. Jarrah was born in Lebanon to a wealthy family and had a secular upbringing. He intended to become a pilot and moved to