Fireworks, crystal ball help usher in 2018 around the world
From spectacular fireworks in Hong Kong and Australia to a huge LED lightshow at the world's tallest building in Dubai, a look at how revelers around the world are ringing in 2018:
CALIFORNIA
The Golden State went green when the calendar turned to 2018.
Starting at midnight, California joined the growing list of states to legalize recreational marijuana. The moment is significant but will not be met with a non-stop pot party.
California has allowed medical marijuana for two decades, and the state is generally tolerant of the drug, so major changes are not expected as the laws are further eased. At least not on New Year's Day.
More than 90 outlets received licenses to sell in time for Jan. 1. None of those outlets is holding a midnight opening, but some in San Diego and the San Francisco Bay Area will be open for business starting at 6 a.m. Monday.
Some cities, including Los Angeles and San Francisco, will have to wait at least until later in the week before licensed outlets start selling there.
Still, some Californians ushered in the new year with marijuana.
Johnny Hernandez was celebrating legalization - which he described as "something we've all been waiting for" - by smoking "Happy New Year blunts" with his cousins in Modesto.
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LAS VEGAS
Las Vegas police officers surrounded hundreds of thousands of tourists gathered to welcome the new year on the Strip, where just three months earlier 58 people died in the deadliest mass shooting in modern U.S. history.
Police cruisers, dump trucks and other large vehicles blocked key intersections to try to prevent anyone from plowing into crowds filled with people wearing glittery hats, tiaras and other 2018-themed paraphernalia.
The Nevada National Guard activated about 350 soldiers and airmen, while federal authorities also deployed additional personnel.
A roughly eight-minute fireworks display at the top of seven of the city's world-famous casino-hotels started ten seconds before midnight Monday. Sprays of gold, red and green lightened the sky on time for 2018.
Tourism officials expected 330,000 people to come to Sin City for the festivities on the Las Vegas Strip and downtown's Fremont Street.
Rosy-cheeked visitors took selfies and livestreamed the celebration amid temperatures in the mid-40s (4 Celsius), much warmer than most of the U.S.
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NEW YORK
With a burst of confetti and fireworks, throngs of revelers ushered in 2018 in a frigid Times Square as the glittering crystal ball dropped.
It was the second-coldest on record, with the temperature only 10 degrees (minus 12 degrees Celsius) in New York at midnight.
Partygoers bundled up in extra layers, wearing warm hats and face masks, dancing and jogging in place to ward off the cold.
There was also tighter security than ever after two terrorist attacks and a rampaging SUV driver who plowed into a crowd on the very spot where the party takes place. The party went off with no major problems.
"Auld Lang Syne" and "New York, New York" played as the crowds cheered.
The coldest ball drop celebration was in 1917, when it was only 1 degree (minus 17 Celsius).
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BRAZIL
Rio de Janeiro's main party was celebrated with fireworks erupting on Copacabana beach after the clock struck midnight to usher in the new year.
After 17 minutes of a multicolored show in the skies, singer Anitta led the party on stage with her single "Vai Malandra," a song that scored 84 million views on YouTube in two weeks. Some of the city's most traditional Carnival samba schools performed later.
New Mayor Marcelo Crivella said he believed the celebrations would bring 3 million people to the iconic beach, which would mean nearly half of Rio's population. But locals said Brazil's economic crisis is still impacting one of the city's biggest parties. In 2017, 2 million people showed up at Copacabana beach, a number that hasn't changed much over the years.
Almost 2,000 policemen patrolled the Copacabana region after yet another violent year on the streets. Rio's hotel association said occupation is nearly total, but mostly by Brazilian tourists.
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GERMANY
Germans rang in 2018 under tight security from police mindful of widespread sexual abuse of women in Cologne two years ago and of a terrorist attack on a Christmas market about a year ago.
Police in Berlin added 1,600 officers on duty and said that large bags and knapsacks would not be allowed on the Party Mile leading from Brandenburg Gate, where thousands of people celebrated at midnight. Police in Frankfurt imposed similar restrictions in the celebration area along the Main River in the country's financial capital.
Two people died from fireworks injuries, but the country avoided a repeat of the mass groping in Cologne from 2016.
Two years ago, New Year's in Cologne was marred by groping and theft committed against hundreds of women, in most cases by migrants. On Dec. 19, 2016, Tunisian asylum seeker Anis Amri drove a stolen truck into a Christmas market in Berlin, killing 12 people.
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UNITED ARAB EMIRATES
Dubai's Burj Khalifa, the world's tallest building, has again served as the focal point of New Year's Eve celebrations - though this year authorities decided against fireworks and chose a massive LED lightshow on it.
That was in part due to safety in the city-state in the United Arab Emirates, which saw a massive skyscraper fire on New Year's Eve in 2015.
The display, running down the east side of the 828-meter-tall (2,716-foot-tall) tower, showed Arabic calligraphy, geometric designs and a portrait of the late Sheikh Zayed bin Sultan Al Nahyan, the UAE's first president.
But a display of neighboring nations' flags didn't show Qatar's flag. The UAE joined Bahrain, Egypt and Saudi Arabia in boycotting the tiny energy-rich nation in June over allegations Doha supports extremists and has too close ties to Iran. Qatar, which will host the 2022 FIFA World Cup, denies supporting extremists and shares a massive offshore natural gas field with Tehran.
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VATICAN
Bidding 2017 farewell, Pope Francis has decried wars, injustices and environmental decay which he says have "ruined" the year.
Francis on Sunday presided at a New Year's Eve prayer service in St. Peter's Basilica, a traditional occasion to say thanks in each year's last hours.
He says God gave to us a 2017 "whole and sound," but that "we humans in many ways ruined and hurt it with works of death, lies and injustices."
But, he added, "gratitude prevails" thanks to those "cooperating silently for the common good."
In keeping with past practice, the pope on New Year's Day will celebrate Mass dedicated to the theme of world peace.
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AUSTRALIA
Fireworks lit up the sky above Sydney Harbor, highlighting the city's New Year's celebrations.
The massive fireworks display included a rainbow waterfall cascade of lights and color flowing off the harbor's bridge to celebrate recently passed legislation legalizing gay marriage in Australia.
More than 1 million people were expected to gather to watch the festivities. Security was tight, but officials said there was no particular alert.
Sydney officials said the event would generate about $170 million for the city and "priceless publicity." Nearly half the revelers were tourists.
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NEW ZEALAND
Tens of thousands of New Zealanders took to streets and beaches, becoming among the first in the world to usher in 2018.
As the new year dawned in this southern hemisphere nation, fireworks boomed and crackled above city centers and harbors, and party-goers sang, hugged, danced and kissed.
In Auckland, New Zealand's biggest city, tens of thousands gathered around Sky Tower as five minutes of nonstop pyrotechnics exploded from the top of the structure.
But on nearby Waiheke Island, 30 kilometers (20 miles) away, authorities canceled the planned fireworks display because of drought conditions and low water supplies for firefighters.
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UGANDA
Thousands of Ugandans gathered at churches across the country to mark the end of 2017.
The raucous events, during which some preachers are known to make dubious predictions, have become such a staple of New Year's Eve festivities that the country's longtime president, Yoweri Museveni, sometimes makes time to make an appearance at a church.
Still, many in this East African country prefer to celebrate at crowded beaches on the shores of Lake Victoria or in darkened halls listening to the music of pop stars who take turns offering crowd pleasers until midnight.
Police warned revelers not to burn car tires in celebration, citing safety reasons, to discourage a favorite activity of those, especially in the countryside, who cannot afford fireworks.
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RUSSIA
As Russians counted down the last moments before 2018 ticked over into each of the country's 11 time zones, President Vladimir Putin called on them to be considerate and conciliatory with each other in the new year.
"Say the most cherished words to each other, forgive mistakes and resentment, admit love, warm up with care and attention," Putin said in a televised message broadcast on Sunday just before midnight.
Moscow had fireworks and outdoor gatherings despite weather that was less than festive. Usually festooned with snow at New Year's Eve, the Russian capital slogged through a long spell of intermittent rain and constant gray skies.
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JAPAN
Many Japanese celebrated the arrival of the Year of the Dog in the traditional way of praying for peace and good fortune at neighborhood Shinto shrines and eating New Year's food such as noodles, shrimp and sweet black beans.
Barbecued beef and octopus dumpling stalls were out at Tokyo's Zojoji Temple, where people took turns striking the giant bell 108 times at midnight, an annual practice repeated at other Buddhist temples throughout Japan.
North Korea's nuclear and missile programs cast a shadow over Japan's hopes for peace, said cab driver Masaru Eguchi, who was ready to be busy all night shuttling shrine visitors.
"The world situation has grown so complex," Eguchi said, adding that he also worried about possible terrorism targeting Japan. "I feel this very abstracted sense of uncertainty, although I really have no idea what might happen."
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INDIA
Security was tight in the southern Indian city of Bangalore to prevent a repeat of incidents of groping and molestation of several women during New Year's Eve celebrations a year ago.
Police Commissioner Sunil Kumar said at least 15,000 police officers were on duty and were being aided by drones and closed-circuit television cameras.
A year ago, police first denied that any sexual harassment had taken place during the celebrations in Bangalore, India's information technology hub. But later, police detained at least six men after several video clips of women being attacked by groups of men spread on social media.
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PHILIPPINES
Scores of people were injured by celebratory firecrackers in the Philippines, which has some of the most raucous New Year's celebrations in Asia.
Although the number of injuries has tapered off in recent years, largely due to hard economic times and government scare campaigns, the figures remain alarming. President Rodrigo Duterte signed an order confining the use of firecrackers to community-designated areas, such as near shopping malls and parks.
Many Filipinos, largely influenced by Chinese tradition, believe that noisy New Year's celebrations drive away evil and misfortune. But they have carried that superstition to extremes, exploding dangerously large firecrackers and firing guns to welcome the new year despite threats of arrest.
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TURKEY
Security measures were ramped up across Turkey, which a year ago was hit by a New Year's attack that killed dozens of people.
In Istanbul, 37,000 officers were on duty, with multiple streets closed to traffic and large vehicles barred from entering certain districts. Several New Year's Eve street parties were canceled for security reasons.
Early on Jan. 1, 2017, an assailant shot his way into Istanbul's Reina nightclub, where hundreds of people were celebrating New Year's. Thirty-nine people, mostly foreigners, were killed, and 79 were wounded. The Islamic State group claimed responsibility.
On Sunday, about 100 people gathered outside the nightclub to remember the victims of the attack.
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LAS VEGAS
Tens of thousands of revelers will ring in the new year in Las Vegas under the close eye of law enforcement just three months after the deadliest mass shooting in modern U.S. history.
Tourism officials expect about 330,000 people to visit Las Vegas for the festivities, which are anchored by a roughly eight-minute fireworks display at the top of seven casino-hotels.
Acts including Bruno Mars, Britney Spears, Celine Dion and the Foo Fighters will keep partiers entertained before and after midnight at properties across Sin City.
The Las Vegas Metropolitan Police Department had every officer working Sunday, while the Nevada National Guard activated about 350 soldiers and airmen.
The federal government sent dozens of personnel to assist with intelligence and other efforts.
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This version corrects the death toll in last year's Christmas market attack in Berlin to 12, not 19.