why were the world trade centers attacked

The 9/11 Memorial opened on September 11, 2011, the 10th anniversary of the attacks. It is located on the western side of the former World Trade Center complex where the Twin Towers once stood. The Memorial was designed by two architects, Michael Arad and Peter Walker, whose proposal was selected in a design competition out of 5,201 submissions from 63 countries. The Memorial park surrounds two enormous reflecting pools set within the footprints of the North and South towers. This is where the towers used to stand. The pools feature 30-foot waterfalls Б the largest man-made waterfalls in North America.


The water cascades into reflecting pools, finally disappearing into the center voids. The names of people who were killed in the 9/11 attacks in New York, at the Pentagon, and on Flight 93, as well as in the 1993 bombing at the WTC, are etched in bronze around the edges of the pools. The plaza is lined with cobblestones and will eventually have more than 400 swamp white oak trees, creating a space for reflection separate from the sights and sounds of the surrounding city.


The trees were selected from a 500-mile radius of the WTC site, including nurseries located in New York, Pennsylvania and near Washington, D. C. , to symbolize areas impacted on 9/11.
Timeline: September 11, 2001 - 8:46 a. m. ET - American Airlines Flight 11 (traveling from Boston to Los Angeles) strikes the north tower of the World Trade Center in New York City. - 9:03 a. m. ET - United Airlines Flight 175 (traveling from Boston to Los Angeles) strikes the south tower of the World Trade Center in New York City. - 9:37 a. m.


ET - American Airlines Flight 77 (traveling from Dulles, Virginia, to Los Angeles) strikes the Pentagon Building in Washington. - 9:59 a. m. ET - South tower of WTC collapses in approximately 10 seconds. - 10:03 a. m. ET - United Airlines Flight 93 (traveling from Newark, New Jersey, to San Francisco) crashes in a field near Shanksville, Pennsylvania. - 10:28 a. m. ET - North tower of WTC collapses. The time between the first attack and the collapse of both World Trade Center towers is 102 minutes.

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