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The Memorial honors the 16 million who served in the armed forces of the U.S. during World War II, the more than 400,000 who died, and the millions who supported the war effort from home. Symbolic of the defining event of the 20th Century, the Memorial is a monument to the spirit, sacrifice, and commitment of the American people to the common defense of the nation and to the broader causes of peace and freedom from tyranny throughout the world. It will inspire future generations of Americans, deepening their appreciation of what the World War II generation accomplished in securing freedom and democracy. Above all, the Memorial stands as an important symbol of American national unity, a timeless reminder of the moral strength and awesome power that can flow when a free people are at once united and bonded together in a common and just cause.

ONE National Gay & Lesbian Archives Inc. promotes the collection, preservation, documentation and understanding of LGBTQA history and culture by providing support for ONE National Gay & Lesbian Archives at the University of Southern California Libraries and by presenting events, exhibitions and other activities.

The mission of the National Center for Children's Illustrated Literature (NCCIL) is to enhance verbal and visual literacy in children by celebrating the best original art published in children's literature. The National Center for Children’s Illustrated Literature exhibits, tours, collects, preserves and promotes original art from the finest children’s literature.

THE NATIONAL BASEBALL HALL OF FAME AND MUSEUM IS A NOT-FOR-PROFIT EDUCATIONAL INSTITUTION DEDICATED TO FOSTERING AN APPRECIATION OF THE HISTORICAL DEVELOPMENT OF THE GAME OF BASEBALL AND ITS IMPACT ON OUR CULTURE BY COLLECTING, PRESERVING, EXHIBITING AND INTERPRETING ITS COLLECTIONS FOR A GLOBAL AUDIENCE, AS WELL AS HONORING THOSE WHO HAVE MADE OUTSTANDING CONTRIBUTIONS TO OUR NATIONAL PASTIME.

The National Cowboy And Western Heritage Museum preserves and interprets the evolving history and cultures of the American West for the education and; enrichment of its diverse audiences of adults and children.

The Friends are recognized by the National Park Service as the official nonprofit supporting partner of Flight 93 National Memorial. Established in 2009, the Friends now include over 280 members from 18 states. Friends are family members of the passengers and crew, first responders and investigative personnel who responded to the crash site in September 2001, U.S. Capitol employees, members of the media, volunteer Ambassadors, and many others from various walks of life, all with the same goal: to ensure that the story of Flight 93 is always honored and remembered.

The National Cowgirl Museum and Hall of Fame honors and celebrates women, past and present, whose lives exemplify the courage, resilience, and independence that helped shape the American West, and fosters an appreciation of the ideals and spirit of self-reliance they inspire.

The NAWCC promotes and preserves horology by educating the public and hobbyists about the art, science, and history of timekeeping. It operates the National Watch & Clock Museum, maintains a major horological research library, runs educational workshops and publications, and supports chapters and events worldwide.

JNPA provides quality educational products and related services that enrich public understanding and appreciation of America's national parks, public lands and historic places. As a non-profit organization, JNPA's purpose is to ensure that visitors to our public lands will enjoy, experience, and engage with the places they treasure.

The Weitzman National Museum of American Jewish History, on Independence Mall in Philadelphia, presents educational programs and experiences that preserve, explore and celebrate the history of Jews in America. Its purpose is to connect Jews more closely to their heritage and to inspire in people of all backgrounds a greater appreciation for the diversity of the American Jewish experience and the freedoms to which Americans aspire.

The National September 11 Memorial and Museum will honor the thousands of lives lost in the attacks of September 11, 2001 and February 26, 1993; the endurance of those who survived; the courage of those who risked their lives to save others; and the compassion of all who supported us in our darkest hours. As a catalyst for the future, this inspiring and dignified space will help restore the spirit and vitality of the surrounding community while seeking to foster understanding and peace in the larger world community.

Founded in 2001 the National Multicultural Western Heritage Museum acknowledges the multicultural contributions of Hispanic Americans, Native Americans, European Americans, and African Americans in the settlement of the American frontier. Works of artists and others who documented people and events of the time via journals, photographs, and other historical items are part of the museum's collection of overlooked materials that tell — often for the first time — the complete story of how the West was won. Through various educational programs (e.g., storytelling sessions, "Forgotten Cowboys Tour," cultural heritage workshops, historical reenactments, participatory learning) at the museum and in the community, the Museum shares our multicultural western heritage while instilling positive values of diversity, tolerance, hard-work, and determination. Visitors to the museum and at our traveling exhibitions leave with an awareness that the American West came into being through the struggles and triumphs of racially and socio-economically diverse people.