Nation marks 25 years since 9/11 with Pentagon tributes and rare artifacts

The Smithsonian's National Museum of American History opened a temporary display of fragile 9/11 artifacts from the World Trade Center, Pentagon, and Flight 93 laid out on tables to help visitors remember and connect with the day. The exhibit arrives amid political scrutiny over how American history is told, with critics pressing for a more unifying narrative while the museum emphasizes memory preservation for future generations.