A blue, steel river water valve sits on a concrete floor. Screws line the border of the circular valve. It is in the open position, allowing the viewer to see through to the concrete wall behind it.

River water valve 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.

Photo by Dan Winters


Access the Museum's resources including interactive timelines, oral histories, registries, and 9/11 primary sources to learn more about the February 26, 1993 World Trade Center bombing, 9/11 and its aftermath.

Dozens of people approach after walking across the Brooklyn Bridge on September Eleventh. They have dust and soot from the World Trade Center in their hair. Behind them, hundreds more people cross the bridge. In the distance is the skyline of lower Manhattan, with a cloud of smoke hovering over downtown.
Collection 9/11 Museum, Roberto Rabanne Archive
Photo by Roberto Rabanne

Interactive Timelines

Interactive timelines chronicle the events of September 11, 2001, the nine-month recovery effort at Ground Zero, and the 1993 World Trade Center bombing. The timelines use images, audio, and video, as well as first-person accounts from the 9/11 Memorial Museum’s permanent collection.

Please note: The timelines contain some graphic images and sensitive content due to the nature of the events related to the World Trade Center bombing, 9/11 attacks, and the aftermath.

The Twin Towers stand over the rest of Lower Manhattan at night. The light of buildings reflects off the East River as the last rays of sunlight create a blue hue over the skyline.
Collection 9/11 Museum, Gift of Jonathan Lockwood Smith, JLS Pho
Photo by Jonathan Lockwood Smith

World Trade Center History

The Twin Towers were the centerpieces of the World Trade Center complex. At 110 stories each, 1 WTC (North Tower) and 2 WTC (South Tower) provided nearly 10-million-square feet of office space for about 35,000 people and 430 companies. 

At a table in a dimly lit room, a woman with her hands on her lap sits across from a man with a pencil and paper. There is a lamp on the table and microphones are positioned in front of the man and woman.
Photograph by Jin S. Lee

Oral Histories

The 9/11 Memorial Museum’s oral history collection tells the story of 9/11 through recorded interviews conducted from different perspectives, most of which cannot be fully captured through written sources.

The Last Column towers over NYPD flag bearers standing to the left and men in suits and ties standing to the right. The Last Column, a fixture of Foundation Hall, is covered in photos and written tribute to rescue and recovery workers.
Photo by Monika Graff


Registries is a digital repository of stories and collective memory from the witnesses, survivors, rescue and recovery workers, and commemorators of 9/11 and the February 26, 1993 World Trade Center bombing.

The Twin Towers dominate the skyline of lower Manhattan at dusk. An orange sunset reflects off of them and surrounding skyscrapers. The sky is a dark blue with a streak of clouds.
Photo by Jonathan Lockwood Smith

Collection 9/11 Museum, Gift of Jonathan Lockwood Smith, JLS Photo

9/11 Primary Sources

These primary resources include speeches, executive orders, legislative acts and debates, and government reports from the decade after the 9/11 attacks.

Lesson Plans

Explore a host of inquiry-based lesson plans for K–12 students and their teachers.

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Getting Here

The Memorial and the Museum are located at the World Trade Center site in lower Manhattan at 180 Greenwich Street and are easily reached by public transportation. 

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