The U.S. side of the Niagara Falls is pictured in Ontario, in this January 8, 2014 file picture (Photo: Reuters)
A large TVS (tornadic vortex signature) thunderstorm supercell passes over storm chaser Brad Mack in Graham, Texas late in this April 23, 2014 file picture (Photo: Reuters)
Pro-European integration protesters take cover from water sprayed from a fire engine at the site of clashes with riot police in Kiev in this January 23, 2014 file photo (Photo: Reuters)
A girl from the minority Yazidi sect rests after fleeing violence in Sinjar, in this August 13, 2014 (Photo: Reuters)
Tariq Khdeir is greeted by his mother after being released from jail in Jerusalem July 6, 2014 (Photo: Reuters)
Palestinians rescue Mahmoud al-Ghol from under the rubble of a house in Rafah in the southern Gaza Strip in this August 3, 2014 (Photo: Reuters)
Protesters hold a petrol bomb during clashes with pro-government forces at Independence Square in Kiev August 7, 2014 (Photo: Reuters)
A woman reporter runs with a rebel fighter to avoid snipers at the frontline against the Islamic State fighters in Aleppo's northern countryside October 10, 2014 (Photo: Reuters)
Cattle graze at the Great Hungarian Plain in Hortobagy, east of Budapest late September 25, 2014. Picture taken September 25, 2014 (Photo: Reuters)
The son (L) of one of the members of Tayseer Al-Batsh's family, who hospital officials said were killed in an Israeli air strike, mourns during their funeral in Gaza City in this July 13, 2014 (Photo: Reuters)
Turkish soldiers keep warm atop a hill overlooking the Syrian town of Kobani, near the Mursitpinar border crossing on the Turkish-Syrian border in the southeastern town of Suruc in Sanliurfa province November 2, 2014 (Photo: Reuters)
An Aurora Borealis (Northern Lights) is seen over a mountain camp north of the Arctic Circle, near the village of Mestervik late September 30, 2014 (Photo: Reuters)
A protester (C) raises his umbrellas in front of tear gas which was fired by riot police to disperse protesters blocking the main street to the financial Central district outside the government headquarters in Hong Kong, September 28, 2014 (Photo: Reuters)
Two women wearing nun outfits drink beer while watching the 2014 Tim Hortons Brier curling championships in Kamloops, British Columbia in this March 8, 2014 (Photo: Reuters)
Actress Angelina Jolie cries at the Srebrenica Genocide Memorial in Potocari in this March 28, 2014 (Photo: Reuters)