In this photo taken on a smartphone on Saturday, July 12, 2014, people run to shelter from hailstorm on the beach at Ob River, the major river in western Siberia in Novosibirsk, Russia. The Investigative Committee said in a statement published online Monday that two young girls aged three and four had died Saturday in the lakeside town of Bredsk, not far from the large Siberian city of Novosibirsk. The two girls died after sustaining traumatic brain injuries when a tree fell on their tent, where they were taking shelter from the storm along with their families. (AP Photo/Nikita Dudnik)

June 7, 2014 - Mediterranean Sea / Italy: Italian navy rescues asylum seekers traveling by boat off the coast of Africa. More than 2,000 migrants jammed in 25 boats arrived in Italy June 12, ending an international operation to rescue asylum seekers traveling from Libya. They were taken to three Italian ports and likely to be transferred to refugee centers inland. Hundreds of women and dozens of babies, were rescued by the frigate FREMM Bergamini as part of the Italian navy's "Mare Nostrum" operation, launched last year after two boats sank and more than 400 drowned. Favorable weather is encouraging thousands of migrants from Syria, Eritrea and other sub-Saharan countries to arrive on the Italian coast in the coming days. Cost of passage is in the 2,500 Euros range for Africans and 3,500 for Middle Easterners, per person. Over 50,000 migrants have landed Italy in 2014. Many thousands are in Libya waiting to make the crossing. (Massimo Sestini/Polaris)

A man backs away as law enforcement officials close in on him and eventually detain him during protests over the death of Michael Brown, an unarmed black teenager killed by a police officer, in Ferguson, Mo., Aug. 11, 2014. The Federal Bureau of Investigation said on Monday that it had opened an inquiry into the weekend shooting of Brown. (Whitney Curtis/The New York Times)

Medical staff carry James Dorbor, 8, suspected of having Ebola, into a treatment facility in Monrovia, Liberia, Sept. 5, 2014. Ebola ó the reality and the hysteria over it ó is having a serious economic impact on Guinea, Liberia and Sierra Leone, three nations already at the bottom of global economic and social indicators. (Daniel Berehulak/The New York Times)

Sinjar Mountains, Iraq. August 12, 2014.
Survivors of the crash, including yazidi refugees and Kurdish and Iraqi Army personnel, onboard a rescue helicopter that transported them from the crash site back to Kurdish-controlled Dohuk Province. An Iraqi Air Force helicopter on a resue misssion in the Sinjar Mountains crashed shortly after takeoff. Onboard the helicopter were dozens of Yazidi refugees stranded in the mountain for days unable to reach the safety of Kurdish-controlled areas of northern Iraq.

(Photo by Moises Saman/MAGNUM)

**EDS.: PLEASE NOTE GRAPHIC CONTENT** A man carries a child as another lies dead after two explosions on a beach in Gaza, July 16, 2014. At least four children playing on a Gaza beach were killed Wednesday, according to witnesses, after reportedly being attacked by an Israeli gunboat. (Tyler Hicks/The New York Times)