Americans are marking the anniversary of one of the nation's most scarring days known as 9/11 today.
The September 11 Memorial and Museum opened exclusively for family members at 7 a.m., bearing solemn witness to the attacks of that fateful day, those who died and the people who risked their lives to save others.
President Donald Trump says during a 9/11 ceremony at the Pentagon that the nation grieves for the people "who were murdered by terrorists" 16 years ago. Two crashed into New York's World Trade Center, a third slammed into the Pentagon and the last crashed in an empty field in Pennsylvania. A JNF monument in Arazim Valley near Jerusalem, called the 9/11 Living Memorial, is the only monument outside of the United States that lists the names of all the victims.
After the names are read out at that ceremony, there will be a public observance with a wreath-laying and public addresses.
In Shanksville, Pennsylvania, Vice-President Mike Pence addressed hundreds of people, including relatives of victims of United Flight 93, at a sombre service.More news: Bahamians terrified as Hurricane Irma 'sucks away' miles of ocean
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The episode fed into questions that then-Republican-nominee Trump had repeatedly raised about Clinton's stamina and transparency.
Trump has often invoked his memories of 9-11 to highlight his hometown's resilience and responders' bravery.
Jose Jimenez/Primera Hora/Getty ImagesA person falls to their death from the World Trade Center after two planes hit the Twin Towers September 11, 2001 in New York City. There is no evidence in news archives of mass celebrations by Muslims there.
For many making the annual pilgrimage to Ground Zero on this 16th anniversary, the pain will still be very raw.