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This truck was from FDNY Engine Company 21, quartered in midtown Manhattan on East 40th Street.

Photo: Christopher Griffith. Recovered from the World Trade Center site after September 11, 2001. Collection 9/11 Memorial Museum, Courtesy of the Port Authority of New York and New Jersey. Presented with permission of the New York City Fire Department.

The tripartite columns from the skin of the towers became known as the Tridents.

Photo: Christopher Griffith

The final piece of steel to be removed from the site, now called the Last Column, was covered in remembrances.

Photo: Christopher Griffith

The display window of Chelsea Jeans was meticulously preserved in its ash-covered state.

Photo: Christopher Griffith

A piece of American Airlines Flight 11.

Photo: Christopher Griffith. Collection 9/11 Memorial Museum, Gift of the Port Authority Police Department Traveling Memorial.

A fragment of American Airlines Flight 77, which hit the Pentagon.

Photo: Christopher Griffith. Courtesy of the American Airlines C.R. Smith Museum.

The slurry wall around the foundation of the original Trade Center, built in the late 1960s to hold back the soft soil and the waters of the Hudson.

Photo: Christopher Griffith

This ambulance, driven by EMS Battalion 17 emergency medical technicians Benjamin Badillo and Edward Martinez, was parked near Vesey and West Streets.

Photo: Christopher Griffith. Recovered from the World Trade Center site after September 11, 2001. Collection 9/11 Memorial Museum, Courtesy of the Port Authority of New York and New Jersey. Presented with permission of the New York City Fire Department.

Chalk call board from New York City Fire Department Ladder 13. Five of the firefighters were killed that day.

Photo: Christopher Griffith

The collapse of the towers exerted unimaginable force. This dense aggregation of rubble, three feet high, is the compressed remains of five full floors.

Photo: Christopher Griffith

Hijacker Mohand al-Shehri’s boarding pass for Flight 175, retrieved from the trash at Boston Logan International Airport.

Photo: Christopher Griffith. Courtesy of the U.S. Department of Justice.

Inside the museum, a view upward to the tower footprints.

Photo: Christopher Griffith

Another view of the slurry wall.

Photo: Christopher Griffith

The FDNY's Ladder Company 3, headquartered on East 13th Street, parked this truck on West Street that day. Twelve of its members were killed in the collapse of the North Tower.

Photo: Christopher Griffith

Another view of Ladder Company 3’s truck.

Photo: Christopher Griffith

The cross-shaped steel fragment that stood over the site.

Photo: Christopher Griffith

The Office of the Deputy Under Secretary of the Army, International Affairs, lost 75 people in the attacks.

Photo: Christopher Griffith. Courtesy of the United States Army Historical Collection, U.S. Army Center of Military History.

When the North Tower collapsed, FDNY lieutenant Mickey Kross was trapped at the third floor of stairwell B. When he got out a few hours later, disoriented, Kross picked up a playing card lying in the debris, the only thing that looked recognizable and undamaged, and carried it thereafter for luck. He later added the Shakespeare quote.

Photo: Christopher Griffith

The TV mast from the roof of the North Tower.

Photo: Christopher Griffith. Recovered from the World Trade Center site after September 11, 2001. Collection 9/11 Memorial Museum, Courtesy of the Port Authority of New York and New Jersey.

Remnant of a box column.

Photo: Christopher Griffith

Almost no office furnishings from the Twin Towers survived. The other damaged Trade Center buildings sheltered a number of ordinary objects, like this file drawer from building 4.

Photo: Christopher Griffith. Recovered from the World Trade Center site after September 11, 2001. Collection 9/11 Memorial Museum, Courtesy of the Port Authority of New York and New Jersey.

The seal of the NYC Mayor’s Office of Emergency Management, pulled from the wreckage of 7 World Trade Center. The mayor’s command center was on the 23rd floor.

Photo: Christopher Griffith. Used with permission of the City of New York and the New York City Office of Emergency Management, Courtesy of Richard Sheirer.

A protester’s sign.

Photo: Christopher Griffith

Badges of trade workers, called in for the recovery effort.

Photo: Christopher Griffith

The Tribute Walk along the South Tower footprint.

Photo: Christopher Griffith
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