Revelers cheer on New Year's Eve in New York's Times Square on Jan. 1, 2015 in New York City.

Fireworks explode above the Strip to ring in the new year on Jan. 1, 2015, in Las Vegas.

In celebration of New Year's Eve, fireworks light up after a game between the Calgary Flames and the Edmonton Oilers at Scotiabank Saddledome on Dec. 31, 2014 in Calgary, Alberta, Canada.

A man rides a paddle board as fireworks explode above him during New Year's festivities on Copacabana Beach on Jan. 1, 2015 in Rio de Janeiro, Brazil.

Fireworks explode over the Reforma Avenue during New Year's Eve celebrations on Dec. 31, 2014 in Mexico City, Mexico.

Fireworks illuminate the night sky over the Ebrie Lagoon in Abidjan, Ivory Coast on Jan. 1, 2015.

Revelers photograph fireworks over the Arc de Triomphe as they celebrate the New Year on the Champs Elysees in Paris on Jan. 1, 2015.

People cheer in front of Rome's ancient Colosseum as fireworks explode to celebrate the new year on Jan. 1, 2015.

Fireworks light up the London skyline and Big Ben just after midnight, Jan. 1, 2015, in London. For the first time thousands of people have bought tickets to stand on the banks of the River Thames near Parliament to celebrate the start of 2015.

Fireworks explode above the ancient temple of Parthenon atop the Acropolis hill during the New Year celebrations in Athens, Jan. 1, 2015.

Fireworks explode during the New Year's party at Brandenburg Gate in Berlin, Jan. 1, 2015.

Fireworks light up the sky above the Saint Basil's Cathedral during the welcoming ceremony for the new year at the Red Square in Moscow, Russia on Jan. 1, 2015.

People look at a firework display during a New Year celebration on Jan. 1, 2015 in Dubai.

Chinese people celebrate the New Year during a New Year's eve countdown event to promote the city's 2022 Winter Olympic bid at Olympic Park on Dec. 31, 2014 in Beijing, China.

Fireworks explode over Victoria Harbour in Hong Kong on Jan. 1, 2015. The city's iconic skyline along Victoria Harbour will light up with an eight-minute pyrotechnic display, as tens of thousands of partygoers will flock to the waterfront to celebrate.

North Koreans gather at the Kim Il Sung Square to watch a fireworks display as they usher in the new year, Jan. 1, 2015 in Pyongyang, North Korea.

Firework display from the top of the Sky Tower to welcome the New Year on Jan. 1, 2015 in Auckland, New Zealand.

New Year's fireworks erupt over Sydney's iconic Harbour Bridge and Opera House during the traditional fireworks at midnight, Jan. 1, 2015.