A man stood in the rubble and called out, asking if anyone needed help, after the collapse of the first World Trade Center Tower on Sept. 11, 2001. More than 2,700 people were killed when Al Qaeda terrorists hijacked US passenger jets and flew them into the twin towers in New York.
Photos by Space Imaging’s IKONOS satellite showing the World Trade Center complex in Manhattan, New York, collected on June 30, 2011 showing the 110-stories twin towers; on September 15, 2001 showing the remains of the 1,350-foot (411.48-meter) twin towers of the World Trade Center, and the debris and dust that have settled in Ground Zero, four days after the terrorist attacks; and June 8, 2002, showing the progress in the reclamation of Ground Zero where the twin towers of the World Trade Center once stood.
An aerial view of the wreckage at the World Trade Center on Sept. 16, 2001.
Workers climbed over the remains of the World Trade Center complex in lower Manhattan, New York, on Sept. 28, 2001.
Firefighters made their way over the ruins of the World Trade Center through clouds of smoke as work continued at ground zero on Oct. 11, 2001, one month after the terrorist attacks.
A major section of Building 6 collapsed as demolition of the remaining piees of the World Trade Center continued on Dec. 18, 2001.
Recovery workers looked on as heavy machinery helped remove debris on Jan. 12, 2002.
Workers unfolded an American flag on May, 25, 2002, on top of the last standing beam at the site of the World Trade Center disaster in New York a few days before the official end of the recovery effort.
Workers unfolded an American flag on May, 25, 2002, on top of the last standing beam at the site of the World Trade Center disaster in New York a few days before the official end of the recovery effort.
Sunlight filtered into the still smoldering remains of Tower Two as workers riding in a basket suspended from a giant crane hovered above on Oct. 27, 2001
Lights illuminated ground zero as the sun set over the Manhattan on Sept. 6, 2002.
The original slurry wall of the World Trade Center, showing steel old cement and the new resh cement, was visible on Nov. 19, 2003.
Workers laid the cornerstone of the Freedom Tower on the location of the World Trade Center on July 4, 2004.
People looked out at the former site of the World Trade Center on May 5, 2005. The construction of the Freedom Tower on the site had run into numerous obstacles.
At ground zero, a lone police officer sat amid the rubble during a ceremony marking the one year anniversary of the attacks on Sept. 11, 2002
Construction workers watched from a ramp as others raised the first of three 25-ton steel columns into position before it was bolted into place on Dec. 19, 2006, a milestone in efforts to build a new office tower to replace the World Trade Center.
Construction at the foundation of the Freedom Towers at the World Trade Center site in New York, September 10, 2007.
Construction continued on the Freedom Tower foundations at the World Trade Center site on June 20, 2008.
On the east side of the World Trade Center bathtub, the old inbound Hudson & Manhattan Railroad tunnels, which also served as truck ramps for the World Trade Center, were visible on July 16, 2005
Friends and relatives of the victims of the Sept. 11 attacks tossed flowers into the Reflecting Pool during a ceremony at ground zero on Sept. 11, 2008
The survivors’ staircase at the World Trade Center was moved to its permanent spot on Dec. 11, 2008. The Vessey Street staircase was used by many to evacuate the towers on Sept. 11, 2001.
The sunken pool, which marks the site of One World Trade Center, was almost entirely framed out in structural steel, except for its southwest corner in a January 2009 photo.
Ironworker Eon Mathieson prepared to connect a steel beam on the fourth floor of One World Trade Center on Nov. 17, 2009. The Port Authority changed the name from Freedom Tower to One World Trade Center in 2009.
The galleria at the World Trade Center, an east-west underground connecting passageway between the Transportation Hub and Battery Park City, was still exposed to daylight during construction on Nov. 18, 2008
A 19th-century ship that has been buried for over 100 years was found on July 14, 2010, during construction at the former World Trade Center site. Archeologists worked to uncover, measure, and collect artifacts quickly before the ship would be buried again.
Work in the memorial pools continued on Aug. 27, 2010.
Looking up at the base of one of the cranes at the One World Trade Center on Aug, 27 , 2010.
Construction continued at the World Trade Center site with the memorial footprints of the twin towers visible on Sept. 7, 2010
People watched out the window as construction continued at the World Trade Center site on March 26, 2010, in New York City. A new development agreement was announced after a 16-month stalemate over building at the site.
People stood on the 20th floor restaurant terrace of the World Center Hotel as construction continued on One World Trade Center and the National September 11 Memorial & Museum on July 8, 2011. The memorial features two reflecting pools on the footprints of the twin towers.
Clouds were reflected in the glass of One World Trade Center on May 11, 2011. The base of the tower was supposed to be covered by prismatic glass panels to cover the bomb-proof concrete, but plans were scrapped.
Tourists looked on as the Fire Department of New York's Ladder Company 3 fire truck, which was responsible for evacuating civilians from the North Tower of the World Trade Center on Sept. 11, 2001, was lowered 70 feet by crane to its exhibition space of the National September 11 Memorial Museum on July 20, 2011.
Construction workers lowered the Sept. 11 cross by crane into a subterranean section of the National September 11 Memorial and Museum on July 23, 2011. The cross is an intersecting steel beam discovered in the World Trade Center rubble which served as symbol of spiritual recovery in the aftermath of 9/11.
A trumpeter played Taps at ground zero at the end of the ninth annual commemoration ceremony on Sept. 11, 2010
A flag flies over Ground Zero before the start of ceremonies marking the 10th anniversary of the 9/11 attacks on the World Trade Center, September 11, 2011.
The World Trade Center ceremony marking the 10th anniversary of the attacks takes place at the National September 11 Memorial, Sept. 11, 2011 in New York.
A flag flies over ground zero before the start of the ceremony marking the 10th anniversary of the 9/11 attacks.
Two steel beams known as the tridents from the original World Trade Center tower were visible inside the National September 11 Museum during construction on July 28, 2011.
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BalasPadam