Today in Pictures: February 18

Refugee children wave from the windows of the train heading for Serbia, near Gevegelia, The Former Yugoslav Republic of Macedonia. Thousand refugees continue to pass through Macedonia on their way to the European Union countries.

Australian dog trainer and former surfing champion Chris de Aboitiz rides a wave with his dogs Millie and Rama off Sydney's Palm Beach.

Pilot Akmal Bin Abdul Kahar watches South Korea's Black Eagles aerobatics team perform a maneuver during an aerial display at the Singapore Airshow at Changi Exhibition.

Members of Turkish forces gather around a bus that was destroyed in an explosion on the road linking the cities of Diyarbakir and Bingol, in southeastern Turkey. Six soldiers were killed after PKK rebels detonated a bomb on the road as their vehicle was passing by, according to Turkey’s state-run Anadolu Agency.

Russian Orthodox Church Patriarch Krill poses at the Bellingshausen station at King George Island of Waterloo, Antarctica.

Electoral agents work by lamp light as a polling station stays open after the scheduled 7 p.m. closing time because voting materials arrived late to the Kisugu village, Kampala, Uganda. Frustrations grew at many polling stations as voters waited for the arrival of the voting materials hours after the polls opened in the morning.

An active aurora borealis hovers over downtown Juneau and the Mendenhall glacier in Alaska.

Members of the Popular Mobilisation Units, pro-government paramilitary forces, cover their ears as they fire a multiple rocket launcher during clashes with Islamic State group jihdists in Iraq's northern Kirkuk province.

A Karamojong tribesman sits as he waits to vote at a polling station during elections in a village near the town of Kaabong in Karamoja region, Uganda.

Paula, 7, poses with her horse on the cracked ground of Atibainha dam, part of the Cantareira reservoir, in Nazare Paulista, near Sao Paulo, Brazil. Picture was taken Feb. 12, but made available to NBC News today.