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Sam Stevenson

By Sam Stevenson

Associate News Editor

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American flags will be flown at half-staff across the United States on September 11 as the country marks the 25th anniversary of the terrorist attacks that killed 2,977 people and reshaped the nation.

The observance comes alongside memorial ceremonies, moments of silence and service events planned nationwide. Federal agencies, state governments, organizations and private citizens are being called on to participate in Patriot Day observances and displays of remembrance.

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A flower and American flag are placed at the September 11 Memorial and Museum, which is located on the land where the Twin Towers once stood before they were destroyed in the attacks on September 11, 2001, on September 09, 2024, in New York City.

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How Americans Are Marking the 25th Anniversary

Beyond official ceremonies, the anniversary is being marked through exhibitions and educational programs.

The "Our Flag Was Still There" installation at the National September 11 Memorial & Museum features flags connected to Ground Zero, the Pentagon and the response that followed the attacks, exploring how the Stars and Stripes became a symbol of resilience and national unity during a period of grief.

Patriot Day is also recognized as a National Day of Service and Remembrance, encouraging Americans to honor victims through volunteer work and community engagement.

Across the country, local governments, veterans groups and civic organizations are expected to hold memorial programs throughout the anniversary period.

File image: The sun sets on the Statue of Liberty in New York City as flags in the Liberty State Park flag plaza fly at half mast honoring the victims of the school shooting earlier in the week in Minneapolis, Minnesota, on August 31, 2025, in Jersey City, New Jersey.

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The Legacy of 9/11 Continues

The anniversary also comes as legal proceedings related to the attacks continue. Last month, a military judge set a June 5, 2028, trial date for alleged 9/11 mastermind Khalid Sheikh Mohammed and three co-defendants at Guantánamo Bay, following the collapse of a proposed plea agreement that would have avoided a death-penalty trial.

Memorial Ceremonies and Moments of Silence

This year's observance focuses on remembrance.

A commemoration ceremony at the National September 11 Memorial & Museum in New York, scheduled to begin at 8:30 a.m. on Friday, is set to feature family members reading the names of those killed in the attacks.

A fiery blasts rocks the World Trade Center after being hit by two planes September 11, 2001 in New York City.

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Key Moments During Friday's Ceremony

Organizers plan to hold seven moments of silence during the ceremony. Six correspond to key moments from September 11, 2001, while a newly added seventh recognizes people who have since died from illnesses and injuries linked to 9/11 exposure.

Americans are encouraged to pause at 8:46 a.m. Eastern time, marking the moment the first hijacked plane struck the North Tower of the World Trade Center.

The schedule for the moments of silence during the 9/11 commemoration ceremony is as follows:

According to the National September 11 Memorial & Museum, the "seventh moment of silence will be observed at the conclusion of the reading of the names, and going forward will be a permanent part of the annual ceremony."

Firefighters walk towards one of the tower at the World Trade Center before it collapsed after a plane hit the building September 11, 2001 in New York City.

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Why It Matters

September 11 remains one of the most solemn dates on the American calendar. In late 2001, Congress designated the date as Patriot Day following the attacks on New York, Pennsylvania and Washington, D.C.

Since then, annual observances have included flying the American flag at half-staff and honoring those who lost their lives.

The 2026 commemoration is especially significant because it marks 25 years since the attacks, a milestone arriving as many younger Americans have no personal memory of the day itself.

This year, ceremonies and observances are centered on remembering the victims, recognizing survivors and honoring first responders, recovery workers and military personnel affected by the attacks and their aftermath.

File image: Flowers adorn the names of the victims of the attacks of Sept. 11, 2001, during a ceremony at the 9/11 Memorial and Museum on September 11, 2021 in New York City.

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What Is the Half-Staff Flag Protocol?

According to guidance published ahead of Patriot Day, the American flag is traditionally flown at half-staff from sunrise to sunset.

Proper protocol calls for the flag to be raised to the peak briefly before being lowered to half-staff, then returned to the peak before it is lowered at the end of the day.

Contact Newsweek editors on this story: Ben Kelly and Shakeema Edwards.

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