Law enforcement officers stand, with some turning their backs, as New York City Mayor Bill de Blasio speaks on a monitor outside the funeral for NYPD officer Wenjian Liu in Brooklyn, New York, Jan. 4, 2015.
A Syrian refugee girl stands behind a door at a makeshift settlement in the village of Ketermaya, south of Beirut, Jan. 8, 2015.
A man holds a giant pencil as he takes part in a solidarity march with thousands of French citizens in the streets of Paris, Jan. 11, 2015. French citizens will be joined by dozens of foreign leaders, among them Arab and Muslim representatives, in a march paying tribute to the shooting victims of the Charlie Hebdo attack.
Demonstrators make their way along Boulevard Voltaire in a unity rally in Paris following a terrorist attack on the offices of the Charlie Hebdo magazine, Jan. 11, 2015 in Paris.
Christopher Furlong/Getty Images
The Calbuco volcano erupts near Puerto Varas, Chile, April 22, 2015. The volcano erupted for the first time in more than 42 years, billowing a huge ash cloud over a sparsely populated, mountainous area in southern Chile.
Diego Main/Aton Chile/AP Photo
Jean Claude Niyonzima, a suspected member of the ruling party's youth militia, pleads with soldiers to protect him from a mob of demonstrators after he came out of hiding in a sewer in Bujumbura, Burundi, May 7, 2015.
Jerome Delay/AP Photo
A young Thai man jumps in the air and cheers as his rocket takes off at the Bun Bang Fai Rocket Festival on May 10, 2015 in Yasothon, Thailand.
Taylor Weidman/Getty Images
Amish youth from Ohio recite gospel songs in the Times Square subway in Midtown, New York, May 15, 2015.
German chancellor Angela Merkel speaks with President Barack Obama at Schloss-Elmau hotel in Garmisch-Partenkirchen, Germany, June 8, 2015, during the G-7 summit.
Michael Kappeler/AP Photo
A couple wearing face masks walk on a street in Seoul, South Korea on June 9, 2015.
Ed Jones/AFP/Getty Images
The front of the White House is lit in the color of the rainbow, June 26, 2015, after the United States Supreme Court issued the decision in the case of Obergefell v. Hodges ruling that same-sex marriage is legal in all states.
Jon Elswick/AP Photo
New York Police Department members kiss in front of Stonewall Inn during the annual Gay Pride Parade in New York, June 28, 2015.
Security forces and rescue teams inspect the site where an Air Force cargo plane crashed in Medan, North Sumatra, Indonesia, June 30, 2015.
An elderly man is crying outside a national bank branch as pensioners queue to get their pensions, with a limit of 120 euros, in Thessaloniki, Greece, July 3, 2015. Greece is almost evenly split over a crucial weekend referendum that could decide its financial fate, with a 'Yes' result possibly ahead by a whisker, the latest survey showed.
Sakis Mitrolidis/AFP/Getty Images
United States' Abby Wambach, right, gets a kiss from her wife, Sarah Huffman, after the U.S. beat Japan 5-2 in the FIFA Women's World Cup soccer championship in Vancouver, British Columbia, Canada, July 5, 2015.
Elaine Thompson/AP Photo
Prince George of Cambridge looks at his sister Princess Charlotte of Cambridge in her pram as he leaves the Church of St Mary Magdalene for the Christening of Princess Charlotte of Cambridge, July 5, 2015, in King's Lynn, England.
Chris Jackson/Getty Images
People cool off at a water park, in Nanjing, Jiangsu province, Aug. 1, 2015.
Residents gather to see huge waves stirred up by strong wind as typhoon Soudelor draws near the mainland of China in Wenling, east China's Zhejiang province on Aug. 8, 2015.
A partially burned American flag lies on the street near the spot where Michael Brown was killed before an event to mark the one-year anniversary of the his death in Ferguson, Missouri, Aug. 9, 2015. Hundreds of people marched, prayed and held moments of silence in Ferguson, Missouri on Sunday to mark the anniversary.
Officers and protesters face off along West Florissant Avenue, Aug. 10, 2015, in Ferguson, Mo.
Jeff Roberson/AP Photo
U.S. embassy employees hang the seal of the United States on the outside of the building a few hours before the ceremonial flag-raising, Aug. 14, 2015, in Havana.
Chip Somodevilla/Getty Images
Russian President Vladimir Putin looks through a window of a research bathyscaphe while submerging into the waters of the Black Sea as he takes part in an expedition near Sevastopol, Crimea, Aug. 18, 2015.
Alexei Nikolsky/RIA Novosti/Kremlin/Reuters
32 year old Mohammad Hasamur Rahman poses for photographs with his new bride, 15 year old Nasoin Akhter, Aug. 20, 2015 in Manikganj, Bangladesh.
Allison Joyce/Getty Images
A migrant man holding a boy react as they are stuck between Macedonian riot police officers and migrants during a clash near the border train station of Idomeni, northern Greece, as they wait to be allowed by the Macedonian police to cross the border from Greece to Macedonia, Aug. 21, 2015.
Darko Vojinovic/AP Photo
WDBJ-TV7 news morning anchor Kimberly McBroom gets a hug from visiting anchor Steve Grant as meteorologist Leo Hirsbrunner reflects after their early morning newscast at the station, Aug. 27, 2015, in Roanoke, Va.
Steve Helber/AP Photo
A Thai veterinarian takes a picture of a 2-year-old orangutan during a health examination at Kao Pratubchang Conservation Centre, Aug. 27, 2015, in Ratchaburi, Thailand.
A member of the Spanish Civil Guard helps people during a fire in the village of Cabreiro, Spain, Aug. 30, 2015.
Miguel Riopa/AFP/Getty Images
A paramilitary police officer carries the lifeless body of a migrant child after a number of migrants died after boats carrying them to the Greek island of Kos capsized, Sept. 2, 2015.
A Palestinian boy sleeps on a mattress during a sandstorm in Gaza, Sept. 8, 2015.
A man reacts after Hungarian police officers stop a group of refugees near a makeshift camp for asylum seekers in Roszke, southern Hungary, Sept. 9, 2015.
Thomas Campean/Anadolu Agency/Getty Images
Nuns celebrate as they wait for the arrival of Pope Francis at St Patrick's Cathedral in New York on Sept. 24, 2015.
Pope Francis, accompanied by members of Congress, waves to the crowd from the Speakers Balcony on Capitol Hill in Washington, Sept. 24, 2015, after addressing a joint meeting of Congress inside.
Doug Mills/AP Photo
An image released by researchers on Sept. 28, 2015 shows dark streaks on the sides of Hale Crater on Mars, inferring the presence of flowing water in the summer months.
NASA/JPL-Caltech/Univ. of Arizona
People stand around a leopard with its head stuck in a vessel in Rajsamand district of Rajasthan state, India, Sept. 30, 2015. The leopard's head got stuck when it attempted to drink water from the pot, according to news reports. Forest officials tranquilized the animal and sawed off the vessel later in the day.
Kabir Jethi/AP Photo
South Koreans and their North Korean relatives on a bus grip their hands each other to bid farewell after the Separated Family Reunion Meeting at Diamond Mountain resort in North Korea, Oct. 22, 2015.
Britain's Prince Charles watches on as Camilla, Duchess of Cornwall holds a knife as they visit Seppeltsfield Winery in South Australia's Barossa Valley, Nov. 10, 2015.
A victim under a blanket lays dead outside the Bataclan theater in Paris, Nov. 13, 2015. The concert hall was one of six attacks in Paris that night that killed 130 people and injured hundreds more.
Jerome Delay/AP Photo
An man plays John Lennon's "Imagine" outside the Bataclan concert hall, Nov. 14, 2015 in Paris.
John Walton PA via AP
Kashmiri Muslims carry the body of Feroz Ahmad, a local pro Kashmir rebel killed in a gun battle with the Indian government forces, during his funeral on Nov. 24, 2015 in Vejbeour in Indian administered Kashmir, India.
Yawar Nazir/ Getty Images
Crystal Matrau-Belt weeps while holding her newborn son, Jeremiah James Matrau-Skokan, at Bronson Methodist Hospital in Kalamazoo, Mich., Dec. 14, 2015. She is comforted by her uncle Michael Myers as she reacts to the deaths of her mother and fiance who were killed in a car crash on the way to the hospital.