Americans streamed to the site of the World Trade Center, the gates of the White House and smaller but no less jubilant gatherings across the country to celebrate the death of Osama bin Laden.
"We've been waiting a long time for this day," Lisa Ramaci, a New Yorker whose husband was a freelance journalist killed in the Iraq war, said early today.
"I think it's a relief for New York tonight just in the sense that we had this 10 years of frustration just building and building, wanting this guy dead, and now he is, and you can see how happy people are."
She was holding a flag and wearing a T-shirt depicting the twin towers and, in crosshairs, bin Laden. Nearby, a man held up a cardboard sign that said, "Obama 1, Osama 0."
Uptown in Times Square, dozens stood together on a clear spring night and broke into applause when a New York Fire Department SUV drove by, flashed its lights and sounded its siren. A man held an American flag, and others sang The Star-Spangled Banner.
In Washington, in front of the White House, a crowd began gathering before President Barack Obama addressed the nation late Sunday to declare, "Justice has been done." The throng grew, and within a half-hour had filled the street in front of the White House and begun spilling into Lafayette Park.
"It's not over, but it's one battle that's been won, and it's a big one," said Marlene English, who lives in Arlington, Va., and lobbies on defense issues. She said she has baked thousands of cookies to send to friends serving in Iraq and Afghanistan over the years and that she was at the White House because they couldn't be.
The celebrations began late last night, as the news broke about the death of bin Laden from bulletins on television, texts and calls from family and friends and posts on social networking sites.
People said they were surprised that bin Laden had finally been found and killed. John Gocio, a doctor from Arkansas who was gathering what details he could from TV screens at O'Hare International Airport in Chicago, marveled: "After such a long time, you kind of give up and say, 'Well, that's never going to happen.'"
The celebration in New York came precisely one year after a militant from Connecticut spread panic by driving a bomb-laden SUV into the heart of Times Square. As the most intense manhunt in history wore on, year after year after 9/11, the city dealt with smaller scares — the Times Square plot, subway and bridge threats, orange alerts.
"It's really a terrific day for not just America but for the world. To have this cancer pulled from us is the right thing," said Guy Madsen, 49, who drove to the city from Clifton, N.J., when he heard of bin Laden's death. "This is judgment day, and we're winning."
Several hours later, the first copies of today's Daily News hit the streets, with a big picture of bin Laden on the cover and the headline: "ROT IN HELL," with the last word in 4-inch-high type.
Mr Gordon Felt, president of an organisation for families of people who were on United Flight 93, which crashed into a Pennsylvania field on Sept. 11, called the announcement of bin Laden's death "important news for us, and for the world." He said in a statement that "It cannot ease our pain, or bring back our loved ones" but does bring "a measure of comfort."
Along with the outburst of joy over bin Laden's death, there was an increase in security — at least in New York, where authorities said there would be extra police at all three area airports "out of an abundance of caution." The Port Authority also said there would be more police along the George Washington Bridge and at ground zero.
But for the most part, as Sunday stretched into Monday, the nation stopped to reflect, and to rejoice.
With final exams looming, thousands of Penn State University students gathered in State College, Pa., the student newspaper reported. One was dressed as Captain America, fireworks were set off and colorful chants rose up from the crowd. At Ohio State University, some students, including the student body president, jumped into a lake on campus to celebrate, according to The Lantern newspaper.
At the White House, Will Ditto, a 25-year-old legislative aide, said he was getting ready to go to bed when his mother called him with the news. He decided to leave his home on Capitol Hill and join the crowd. As he rode the subway to the White House, he told fellow passengers the news.
"It's huge," he said. "It's a great day to be an American."
George Washington University student Alex Washofsky, 20, and his roommate Dan Fallon, 20, joined the crowd. Washofsky, a junior and a member of the Navy Reserve Officer Training Corps, recalled the day shortly after Sept. 11 when President George W. Bush evoked the phrase from "Wanted" posters in the old West, "dead or alive."
"And we did it," Washofsky said.
American flags of all sizes were held aloft, worn draped over the shoulders or gripped by many hands for a group wave. Some people climbed trees and lampposts to better display the flags they carried. Others without flags simply pumped their fists in the air.
The impromptu street party took on aspects of a pep rally at times. Some people offered up the "hey, hey, goodbye" singsong chant more typically used to send defeated teams off to their locker rooms. Parth Chauhan, a sophomore at George Washington University, trumpeted a World Cup-style vuvuzela.