Four passenger airliners, which were hijacked by al-Qaeda terrorists, crashed into the World Trade Center complex in New York City and the Pentagon, leaving almost 3,000 people dead on September 11, 2001.
Four passenger airliners, which were hijacked by al-Qaeda terrorists, crashed into the World Trade Center complex in New York City and the Pentagon, leaving almost 3,000 people dead on September 11, 2001.