U.S. Marks 9/11 Anniversary

The U.S. marked 25 years since the Sept. 11, 2001, attacks with memorial events for nearly 3,000 people killed in New York, at the Pentagon and in Pennsylvania. The National September 11 Memorial & Museum added a seventh moment of silence for people who later died from illnesses linked to Ground Zero exposure. About 100 million Americans were not yet alive on 9/11, making archival footage, memorials and survivor accounts central to public memory. A new poll found 47% of U.S. adults list 9/11 among the most important historic events of their lifetimes.