The Twin Towers were two identical skyscrapers located in the World Trade Center complex in Lower Manhattan, New York City. They were completed in 1973 and stood at 110 stories each, making them the tallest buildings in the world at the time. The towers were a symbol of American economic power and were home to many financial and business offices.

On September 11, 2001, the Twin Towers were targeted by terrorists who hijacked two commercial airplanes and flew them into the buildings. The impact and subsequent fires caused both towers to collapse, killing nearly 3,000 people and injuring thousands more. The attacks on the Twin Towers were part of a larger coordinated terrorist attack on the United States that day, which also included the Pentagon and a failed attempt on the White House.

The destruction of the Twin Towers was a defining moment in American history and led to significant changes in national security policies and international relations. The site of the Twin Towers is now a memorial and museum, honoring the victims and heroes of the 9/11 attacks.