A U.S. Flag hanging from a steal girder, damaged in the Sept. 11, 2001 attacks on the World Trade Center, blows in the breeze at a memorial in Jersey City, N.J., Sept. 11, 2019 as the sun rises behind One World Trade Center building and the re-developed area where the Twin Towers of World Trade Center once stood in New York City on the 18th anniversary of the attacks. (AP Photo/J. David Ake) 
The names are read of victims of the Sept. 11 attacks during a ceremony marking the 18th anniversary at the National September 11 Memorial, Wednesday, Sept. 11, 2019 in New York. (AP Photo/Mark Lennihan) 
Family members hold up photos during a ceremony marking the 18th anniversary of the attacks of Sept. 11, 2001 at the National September 11 Memorial, Wednesday, Sept. 11, 2019 in New York. (AP Photo/Mark Lennihan) 
Louis Gonzalez makes a rubbing of his sister’s name at the National September 11 Memorial, Wednesday, Sept. 11, 2019 in New York. Aida Rosario was killed during the attacks of Sept. 11, 2001. (AP Photo/Mark Lennihan) 
A woman stands next to the north pool prior to a ceremony marking the 18th anniversary of the attacks of Sept. 11, 2001 at the National September 11 Memorial, Wednesday, Sept. 11, 2019 in New York. (AP Photo/Mark Lennihan) 
A woman wipes away tears as she stands next to the north pool prior to a ceremony marking the 18th anniversary of the attacks of Sept. 11, 2001 at the National September 11 Memorial, Wednesday, Sept. 11, 2019 in New York. (AP Photo/Mark Lennihan) 
New York City firefighters stand at attention in front of a memorial on the side of a firehouse adjacent to One World Trade Center and the 9/11 Memorial site during ceremonies commemorating the 18th anniversary of the 9/11 terrorist attacks in New York on Wednesday, Sept. 11, 2019. (AP Photo/Craig Ruttle) 
In this Sept. 9, 2019 photo, the World Trade Center is shown in New York. Wednesday, Sept. 11, 2019 marks the 18th anniversary of the terrorist attacks against the United States. (AP Photo/Mark Lennihan) 
The Tribute in Light rises above the lower Manhattan skyline, Tuesday, Sept. 10, 2019 in New York. Wednesday marks the 18th anniversary of the terror attacks against the United States of Sept. 11, 2001. (AP Photo/Mark Lennihan) 
A visitor to the Flight 93 National Memorial in Shanksville, Pa., views the Wall of Names on Tuesday, Sept. 10, 2019, as the nation prepares to mark the 18th anniversary of the Sept. 11, 2001 attacks. (AP Photo/Gene J. Puskar) 
Visitors to the Flight 93 National Memorial in Shanksville, Pa., participate in a sunset memorial service on Tuesday, Sept. 10, 2019, as the nation prepares to mark the 18th anniversary of the Sept. 11, 2001 attacks. (AP Photo/Gene J. Puskar) 
New York Fire Department members attend a second funeral service for FDNY firefighter Michael Haub in Franklin Square, N.Y., Tuesday, Sept. 10, 2019. The firefighter from New York’s Long Island who died in the World Trade Center attacks is being remembered for a second time on the eve of the 18th anniversary of 9/11. Friends and family gathered at the memorial service for Haub on Tuesday in Franklin Square. Last week, the New York City medical examiner identified more of his remains recovered at ground zero. (AP Photo/Eduardo Munoz Alvarez) 
Kiersten Haub, from left, Erika Starke, and Michael Haub, family members of New York firefighter Michael Haub, attend a second funeral service for him in Franklin Square, N.Y., Tuesday, Sept. 10, 2019. The firefighter from New York’s Long Island who died in the World Trade Center attacks is being remembered for a second time on the eve of the 18th anniversary of 9/11. Friends and family gathered at the memorial service for Haub on Tuesday in Franklin Square. Last week, the New York City medical examiner identified more of his remains recovered at ground zero. (AP Photo/Eduardo Munoz Alvarez) 
FILE – In this Sept. 11, 2001, file photo, firefighters work beneath the destroyed mullions, the vertical struts that once faced the outer walls of the World Trade Center towers, after a terrorist attack on the twin towers in New York. Sept. 11 victims’ relatives are greeting the news of President Donald Trump’s now-canceled plan for secret talks with Afghanistan’s Taliban insurgents with mixed feelings. (AP Photo/Mark Lennihan, File) 
FILE – In this Sept. 11, 2001, file photo, smoke rises from the burning twin towers of the World Trade Center after hijacked planes crashed into the towers in New York City. Sept. 11 victims’ relatives are greeting the news of President Donald Trump’s now-canceled plan for secret talks with Afghanistan’s Taliban insurgents with mixed feelings. (AP Photo/Richard Drew, File) 
Norma Molina, of San Antonio, Texas, leaves flowers by the names of firefighters from Engine 33 at the September 11 Memorial, Monday, Sept. 9, 2019, in New York. Her boyfriend Robert Edward Evans, a member of Engine 33, was killed in the north tower of the World Trade Center on Sept. 11, 2001. (AP Photo/Mark Lennihan)
NEW YORK | Americans commemorated 9/11 with solemn ceremonies and vows Wednesday to “never forget” 18 years after the deadliest terror attack on American soil.
Victims’ relatives assembled at ground zero, where the observance began with a moment of silence and the tolling of bells at 8:46 a.m. — the moment a hijacked plane slammed into the World Trade Center’s north tower.
“As long as the city will gift us this moment, I will be here,” Margie Miller, who lost her husband, Joel, said at the ceremony, which she attends every year. “I want people to remember.”
After so many years of anniversaries, she has come to know other victims’ relatives and to appreciate being with them.
“There’s smiles in between the tears that say we didn’t do this journey on our own. That we were here for each other. And that’s the piece that I think we get from being here,” she said.
President Donald Trump and first lady Melania Trump led a moment of silence on the White House South Lawn and then were expected to join an observance at the Pentagon. Vice President Mike Pence was scheduled to speak at the third crash site, near Shanksville, Pennsylvania.
Former President George W. Bush, commander in chief at the time of the 2001 attacks, was due at an afternoon wreath-laying at the Pentagon.
The nation is still grappling with the aftermath of 9/11. The effects are visible from airport security checkpoints to Afghanistan, where the post-9/11 U.S. invasion has become America’s longest war.
Earlier this week, Trump called off a secret meeting at Camp David with Taliban and Afghan government leaders and declared the peace talks “dead.” As the Sept. 11 anniversary began in Afghanistan, a rocket exploded at the U.S. Embassy just after midnight.
The anniversary ceremonies center on remembering the nearly 3,000 people killed when hijacked planes slammed into the trade center, the Pentagon and a field near Shanksville on Sept. 11, 2001.
All those victims’ names are read aloud at the ground zero ceremony by loved ones — now, quite often, ones too young to have known their lost relatives.
“Uncle Joey, I wish I got to know you,” Joseph Henry said of his uncle and namesake, firefighter Joseph Patrick Henry. “I know that you’re watching over us right now.”
Others made a point of spotlighting the suffering of another group of people tied to the tragedy: firefighters, police and others who died or fell ill after exposure to the wreckage and the toxins unleashed in it.
“As we honor and remember all those who died on 9/11 and their families, let us not forget the first responders who have died since 9/11 and their families,” Maureen Pulia said after reading names at ground zero. Her cousin Thomas Anthony Casoria, a firefighter, was killed there.
A compensation fund for people with potentially Sept. 11-related health problems has awarded more than $5.5 billion so far. More than 51,000 people have applied. Over the summer, Congress made sure the fund won’t run dry.
The sick gained new recognition this year at the memorial plaza at ground zero, where the new 9/11 Memorial Glade was dedicated this spring.
Sept. 11 is known not only as a day for remembrance and patriotism, but also as a day of service. People around the country volunteer at food banks, schools, home-building projects, park cleanups and other charitable endeavors on and near the anniversary.
Associated Press writer Michael R. Sisak contributed.