One of the deadliest terrorist assaults in American history was the September 9 attacks, often known as the 9/11 terrorist attacks.
The attacks in 2001 targeting New York City and Washington, DC, that involved a number of hijacked planes and militants, left behind extensive destruction and costed approximately 3,000 lives.
The attacks involved the hijacking of four planes, three of which were used to strike significant U.S. sites 9
United Airlines flight 175 and American Airlines flight 11 both crashed into the north and south buildings of the World Trade Centre, and American Airlines flight 77 struck the Pentagon.
Overwhelming mental anguish was brought on by the assaults, particularly when the twin towers, New York City's iconic icon, fell to the ground.
The U.S. economy suffered significantly as a result of the 9/11 attacks. During the attacks, many Wall Street institutions were evacuated, including the New York Stock Exchange.
The opening of One World Trade Centre, a 1,776-foot (541.3-metre) skyscraper, on November 3, 2014, filled the physical and symbolic hole left by the loss of the Twin Towers instantly established a striking new symbol on the Manhattan skyline.