Skip to Main Content
It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.

9/11: Twenty Years After

Remember and research the terrorist attacks on September 11, 2001 and the events that followed.

Remembering 9/11

2021 marks twenty years since the terrorist attacks that occurred on September 11, 2001. Many remember where they were when they heard about the hijacked planes, or recall seeing the World Trade Center Twin Towers fall on television news, or know someone who was living in NYC or working in the Twin Towers. Those living in the Baltimore and Washington, D.C. area at the time worried about the safety of friends and family working in or close to the Pentagon and other government offices. We honor those that died and remember, with hope, that such an attack never happens again.

Use this research guide to remember and research the events, stories, and aftermath of 9/11 through digital exhibits, collections, and memorials that documented the stories and the events surrounding the 9/11 terrorist attacks and the aftereffects. Expand your understanding and start your research with the books, databases, digital archives, and resources available at RLB Library and from other libraries and archives.


Guide created by Laura Bell, August 2021

From the 9/11 Memorial & Museum in NYC

The 9/11 Memorial & Museum is the foremost institution in the United States dedicated commemorating those who died in the 2001 and 1993 terrorist attacks in addition to documenting, exploring, and examining the events of September 11, 2001 and their lasting impact and significance. The 9/11 Memorial & Museum is located at the World Trade Center in New York City where it utilizes artifacts and stories to share the story of the attacks with visitors. To further provide learning opportunities at distance, the website offers a number of digital resources in addition to the interactive timelines below.
The interactive timelines feature images, video, objects, and first-hand accounts from individuals who witnessed the September 11 attack, the following recovery at ground zero, and the 1993 World Trade Center Bombing. Select a timeline and scroll through the events as they happened. Select individual images to enlarge them further.



Online Resources from the 9/11 Memorial & Museum include digital exhibits, oral histories, registries, and a 9/11 primer to
help online learners research and learn more about the 1993 World Trade Center Bombing, the 9/11 Attack, and the aftermath.



2021 marks 20 years since the 9/11 terrorist attacks in the U.S. Learn more about the attacks and the repercussions with the educational content and events the 9/11 Memorial & Museum is planning for the 20 Years Later memorial of the attacks on September 11, 2001.


Memorials and Monuments: The Pentagon and Flight 93

Visit The National 9/11 Pentagon Memorial online to learn more about the events surrounding the attack on the Pentagon outside of Washington, D.C. The online memorial will provide information about the events of September 11, 2001, interactive timelines, photographs of the memorial itself, and educational resources for online learners. Information about the construction of the memorial and visiting the memorial is also available. 


Visit the Flight 93: National Memorial in Pennsylvania managed by the National Park Services to learn about Flight 93 and the actions of the passengers who diverted the hijacked plane from its course towards the U.S. Capitol on September 11. Learn about the memorial itself in Pennsylvania where the plane crashed with educational online resources, find descriptions of events including the 20th anniversary observance in 2021, and learn how to visit in person.