The 8-acre commemorative plaza will be dedicated in a 10th-anniversary ceremony to be attended by President Barack Obama, former President George W. Bush and family members of 9/11 victims. It opens to public ticket holders on Sept. 12.
The sun gleams off One World Trade Center
The sun gleams off One World Trade Center as it reflects on the names etched along the North memorial pool at the 9/11 Memorial. (Sept. 6, 2013) (Credit: Craig Ruttle)
A person photographs roses left behind at the
A person photographs roses left behind at the North memorial pool at the 9/11 Memorial. (Sept. 6, 2013) (Credit: Craig Ruttle)
Visitors to the 9/11 Memorial wait in line
Visitors to the 9/11 Memorial wait in line to enter. The 9/11 Memorial foundation began collecting a $2 fee for advance reservations. (April 13, 2013) (Credit: Charles Eckert)

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Visitors to the 9/11 Memorial enter the memorial.
Visitors to the 9/11 Memorial enter the memorial. The 9/11 Memorial foundation began collecting a $2 fee for advance reservations. (April 13, 2013) (Credit: Charles Eckert)
Flowers are placed on the names of the
Flowers are placed on the names of the victims of the 1993 World Trade Center bombing during the 20th anniversary ceremony for those attacks at the 9/11 Memorial. (Feb. 26, 2013) (Credit: Charles Eckert)
A bouquet of flowers is left next to
A bouquet of flowers is left next to the names of the victims of the 1993 World Trade Center bombing during the 20th anniversary ceremony for the attacks at the 9/11 Memorial. (Feb. 26, 2013) (Credit: Charles Eckert)
A woman, who others said was honoring Thomas
A woman, who others said was honoring Thomas Tong, weeps on the south pool wall of the 9/11 Memorial during observances held on the 11th anniversary of the attacks on the World Trade Center. (Sept. 11, 2012) (Credit: Craig Ruttle)
Paige Bachety, of Sayville, traces a name at
Paige Bachety, of Sayville, traces a name at the 9/11 memorial site in New York. (Dec. 22, 2011) (Credit: Howard Schnapp)

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Paige Bachety, of Sayville, traces a name at
Paige Bachety, of Sayville, traces a name at the 9/11 memorial site in New York. (Dec. 22, 2011) (Credit: Howard Schnapp)
Paige Bachety, left, visits the 9/11 memorial in
Paige Bachety, left, visits the 9/11 memorial in New York. (Dec. 22, 2011) (Credit: Howard Schnapp)
Julie Jalbert-Pitt, left, who lost her father, Robert
Julie Jalbert-Pitt, left, who lost her father, Robert Jalbert, on 9/11, holds her daughter, Campbell Pitt, 8 months, next to the name of her father during the 10th anniversary ceremonies at the site of the World Trade Center. (Sept. 11, 2011) (Credit: Getty Images)
A visitor to the National Sept. 11 memorial
A visitor to the National Sept. 11 memorial makes an impression of a name on a master sheet containing the names of all those killed on Sept. 11, 2001. (Sept. 11, 2011) (Credit: AP)
Family members at the names etched at the
Family members at the names etched at the south reflecting pool during 10th anniversary ceremonies at the Sept. 11 memorial. (Sept. 11, 2011) (Credit: AP)

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A New York firefighter pauses at the firefighters
A New York firefighter pauses at the firefighters memorial wall that displays the names of victims of Sept. 11 at Ground Zero on the 10th anniversary of the terrorist attacks in New York. (Sept. 11, 2011) (Credit: AP)
A New York City police officer salutes at
A New York City police officer salutes at the north pool of the Sept. 11 memorial as the national anthem is sung during the 10th anniversary ceremonies. (Sept. 11, 2011) (Credit: Pool, Justin Lane)
NEW YORK, NY - SEPTEMBER 11: Flowers are
NEW YORK, NY - SEPTEMBER 11: Flowers are placed at the North Memorial Pool during the tenth anniversary ceremonies of the September 11, 2001 terrorist attacks at the World Trade Center site, September 11, 2011 in New York City. New York City and the nation are commemorating the tenth anniversary of the terrorist attacks which resulted in the deaths of nearly 3,000 people after two hijacked planes crashed into the World Trade Center, one into the Pentagon in Arlington, Virginia and one crash landed in Shanksville, Pennsylvania. (Photo by Jefferson Siegel-Pool/Getty Images) (Credit: Getty/Pool)
Nancy Gregory hugs her sons as they pay
Nancy Gregory hugs her sons as they pay their respects to her husband, firefighter Ken Kumpel, at the National 9/11 Memorial. (Sept. 11, 2011) (Credit: Getty Images)
Family members who lost loved ones bring flowers
Family members who lost loved ones bring flowers to the memorial during 10th anniversary ceremonies of the 9/11 attacks. (Sept. 11, 2011) (Credit: Getty Images)
A family member holds up a photograph of
A family member holds up a photograph of New York City firefighter Gregory Sikorsky, killed in the Sept. 11 terrorist attacks, at the 9/11 Memorial plaza during the 10th anniversary ceremony. (Sept. 11, 2011) (Credit: Charles Eckert)
Defense Secretary Leon Panetta speaks to reporters after
Defense Secretary Leon Panetta speaks to reporters after touring the National September 11 Memorial & Museum in New York. (Sept. 6, 2011) (Credit: AP)
New York City Mayor Michael Bloomberg shows U.S.
New York City Mayor Michael Bloomberg shows U.S. Defense Secretary Leon Panetta the National September 11 Memorial & Museum at the World Trade Center. (Sept. 6, 2011) (Credit: Getty Images)
A view of the World Trade Center north
A view of the World Trade Center north tower memorial pool at the National September 11 Memorial & Museum New York. (Sept. 6, 2011) (Credit: AP)
A view of the World Trade Center south
A view of the World Trade Center south tower memorial pool at the National September 11 Memorial and Museum in New York. (Sept. 6, 2011) (Credit: Getty Images)
The National September 11 Memorial & Museum. (Aug.
The National September 11 Memorial & Museum. (Aug. 30, 2011) (Credit: Charles Eckert)
Joe Daniels, president of the 9/11 Memorial, poses
Joe Daniels, president of the 9/11 Memorial, poses for a portrait in his office overlooking the National September 11 Memorial & Museum. (Aug. 30, 2011) (Credit: Charles Eckert)
A worker piles construction debris into a dumpster
A worker piles construction debris into a dumpster at the World Trade Center site in New York. (Aug. 24, 2011) (Credit: AP)
Construction continues at the September 11 Memorial waterfalls
Construction continues at the September 11 Memorial waterfalls in New York. (Aug. 24, 2011) (Credit: AP )
Construction continues at the World Trade Center site
Construction continues at the World Trade Center site with One World Trade Center rising behind in New York City. (Aug. 24, 2011) (Credit: Getty Images)
Construction continues on the National September 11 Memorial
Construction continues on the National September 11 Memorial & Museum at the World Trade Center site. (Aug. 24, 2011) (Credit: Getty Images)
A view of the south pool waterfall with
A view of the south pool waterfall with the Freedom Tower in the background as work continues on the National September 11 Memorial and Museum at the World Trade Center site. (Aug. 4, 2011) (Credit: Getty Images)
The waterfall of the North Tower reflecting pool
The waterfall of the North Tower reflecting pool flows at the 9/11 Memorial Plaza and surrounding Ground Zero construction. The building in the background will be the entrance to the 9/11 Memorial Museum. (Aug. 9, 2011) (Credit: Craig Ruttle)
Construction progresses at the 9/11 Memorial Plaza and
Construction progresses at the 9/11 Memorial Plaza and surrounding Ground Zero construction. These are just a few of the hundreds of trees on the 8-acre plaza. (Aug. 9, 2011) (Credit: Craig Ruttle)
A file photo of the 9/11 Memorial Plaza
A file photo of the 9/11 Memorial Plaza and the surrounding Ground Zero area. These are just a few of the hundreds of trees on the 8-acre plaza. (Aug. 9, 2011) (Credit: Craig Ruttle)
The waterfall of the North Tower reflecting pool
The waterfall of the North Tower reflecting pool flows at the 9/11 Memorial Plaza. (August 9, 2011) (Credit: Craig Ruttle)
One World Trade Center rises above the South
One World Trade Center rises above the South Tower reflecting pool and the 9/11 Memorial Plaza and surrounding Ground Zero construction. (August 9, 2011) (Credit: Craig Ruttle)
Construction workers prepare the South Tower reflecting pool
Construction workers prepare the South Tower reflecting pool of the 9/11 Memorial Plaza at Ground Zero. (August 9, 2011) (Credit: Craig Ruttle)
A worker with KC Fabricators works on stone
A worker with KC Fabricators works on stone containing the names of victims above the North Tower reflecting pool at the 9/11 Memorial Plaza and surrounding Ground Zero construction. (August 9, 2011) (Credit: Craig Ruttle)
Cranes are reflected in the water of the
Cranes are reflected in the water of the North Tower reflecting pool as water flows at the 9/11 Memorial Plaza and surrounding Ground Zero construction. (August 9, 2011) (Credit: Craig Ruttle)
Construction progresses at the 9/11 Memorial Plaza and
Construction progresses at the 9/11 Memorial Plaza and surrounding Ground Zero construction. These are just a few of the hundreds of trees on the 8-acre plaza. (Aug. 9, 2011) (Credit: Craig Ruttle)
Firefighters and other dignitaries watch as the FDNY's
Firefighters and other dignitaries watch as the FDNY's Ladder Company 3 fire truck is lowered by crane into the National September 11 Memorial Museum in New York. (July 20, 2011) (Credit: AP)