Costumed runners prepare to compete in the 2016 Athens Santa Run in Greece. | (AP Photo/Yorgos Karahalis)

Military veterans huddle together during protests against the Dakota Access oil pipeline in Cannon Ball, North Dakota. | (AP Photo/David Goldman)

Men exercise among the trees on a cold winter morning in Kashmir, India. | (REUTERS/Danish Ismail)

Fireworks explode next to riot police during clashes following an anniversary rally marking the 2008 police shooting of a 15-year-old student in Athens. | (REUTERS/Alkis Konstantinidis)

A wedding ceremony at a camp for internally displaced people in Khazir, near Mosul, Iraq. | (AP Photo/Hadi Mizban)

Choristers from St Paul's Cathedral choir rehearse at the cathedral in London. | (REUTERS/Clodagh Kilcoyne)

A Texas A&M student signs a message board on campus for an "Aggies United" event to counter a white nationalist speech at the university. | (AP Photo/David J. Phillip)

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People walk along the Neva River at sunset in St. Petersburg, Russia. | (AP Photo/Dmitri Lovetsky)

A family, whose patriarch, an imam, was arrested in 2015 and hasn't been heard from since, gathers at their home in Kanifing, Gambia. | (AP Photo/Jerome Delay)

A handler bathes a horse in the Caribbean Sea near Bridgetown, Barbados. | (REUTERS/Adrees Latif)

Pope Francis kisses a baby during his weekly general audience address at the Vatican. | (AP Photo/Andrew Medichini)

The Mont-Blanc mountain surrounded by a sea of mist near Geneva, Switzerland. | (REUTERS/Denis Balibouse)

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