USA HISTORY

Detailed explanation-1: -The World Trade Center site, often referred to as “Ground Zero” or “the Pile” immediately after the September 11 attacks, is a 14.6-acre (5.9 ha) area in Lower Manhattan in New York City.

Detailed explanation-2: -They were the main buildings of the World Trade Center. Construction of the North Tower at One World Trade Center began in 1966 with the South Tower at Two World Trade Center.

Detailed explanation-3: -One World Trade Center officially opens in New York City, on the site of the Twin Towers. One World Trade Center officially opens in Manhattan on November 3, 2014.

Detailed explanation-4: -Ground Zero originated as a term to describe the site of a nuclear explosion and later was used to refer to the point of any dramatic or violent event. New Yorkers started calling the World Trade Center site Ground Zero shortly after suicide hijackers destroyed the twin towers and killed nearly 3, 000 people.

Detailed explanation-5: -The North Tower stood over a quarter-mile tall at 1, 368 feet. Its transmission tower with broadcast antennas added about 360 feet more. The South Tower stood over a quarter-mile tall at 1, 362 feet.