ˌWorld ˈTrade ˌCenter, the BrE AmE
a group of buildings in Manhattan, New York City, which included two very tall ↑ skyscraper s , also known as the Twin Towers, that were the tallest in the world when they were built in the 1970s. In 1993 ↑ terrorist s killed six people with a bomb they had left there. On 11 September 2001, terrorists flew two planes filled with passengers into the Twin Towers which caused them to fall down. Almost 3000 people were killed, including everyone on the planes and many ↑ firefighter s and police officers who were trying to save people in the buildings. It is believed that the terrorist organization al-Qaeda was responsible for the attack. The rebuilt World Trade Center has new office buildings, including the Freedom Tower, and a ↑ memorial .