On this day September 11, 2001 a series of four suicide attacks were committed in the United States. Coordinated to strike areas of New York City and Washington, D.C. 19 terrorists from the Islamist militant group al-Qaeda hijacked four passenger jets. The hijackers intentionally piloted two of those planes, American Airlines Flight 11 and United Airlines Flight 175, into the North and South towers of the World Trade Center complex in New York City; despite being built to resist the impact of jet airliners, both towers collapsed within two hours. The hijackers also intentionally crashed American Airlines Flight 77 into the Pentagon in Arlington, Virginia, and intended to pilot the fourth hijacked jet, United Airlines Flight 93, into the United States Capitol Building in Washington, D.C.; however, the plane crashed into a field near Shanksville, Pennsylvania after its passengers attempted to take control of the jet from the hijackers. Nearly 3,000 people died in the attacks, including the 246 civilians and 19 hijackers aboard the four planes. Today marks the 11th anniversary of the attacks. Since then the head of Al Queda Osama Bin Laden has been killed.