NEW YORK — Americans are marking 24 years since the Sept. 11, 2001, attacks with solemn ceremonies, volunteer work and other tributes honoring the victims.

What You Need To Know • Americans are marking 24 years since the Sept. 11, 2001, attacks with solemn ceremonies, volunteer work and other tributes honoring the victims • At the World Trade Center site in New York City, the nearly 3,000 victims' names were being read aloud Thursday • At the Pentagon in Virginia, a memorial service honored the 184 service members and civilians killed • And near Shanksville, Pennsylvania, a similar ceremony honors the victims of Flight 93

Many loved ones of the nearly 3,000 people killed joined dignitaries and politicians at commemorations Thursday in New York, at the Pentagon and in Shanksville,

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