An Afghan woman fills containers with water near her temporary shelter at an internally displaced person's (IDP) camp on the outskirts of Herat, Afghanistan, January 21, 2015. Dozens of families are living in temporary shelters even in harsh winters and most depend on aid distributions by the United Nations High Commissioner for Refugees (UNHCR). (Photo by Jalil Rezayee/EPA)

Indian Hindu devotees walk across a pontoon bridge to arrive at the Sangam, the confluence of the Ganges, Yamuna, and the mythical Saraswati on “Mauni Amavasya” or new moon day, the third and the most auspicious date of bathing during the annual month long Hindu religious fair “Magh Mela” in Allahabad, India, Tuesday, January 20, 2015. Hundreds of thousands of Hindu pilgrims take dips in the confluence, hoping to wash away sins during the month long festival. (Photo by Rajesh Kumar Singh/AP Photo)

Referee Tony Weeks, left, Deontay Wilder, right, and Bermane Stiverne fall to the mat during the WBC heavyweight championship boxing match Saturday, January 17, 2015, in Las Vegas. (Photo by Isaac Brekken/AP Photo)

In this October 10, 2014 file photo, the frame of a car sits on the cracked earth at the bottom of the Atibainha dam, part of the Cantareira System responsible for providing water to the Sao Paulo metropolitan area, in Nazare Paulista, Brazil. Halfway through the rainy season, the key reservoir for the hemisphere's largest city, the Cantareira water system, holds just 6 percent of its capacity, and experts warned Friday, January 16, 2015 that authorities must take urgent steps to prevent the worst drought here in more than 80 years from drying it out. (Photo by Andre Penner/AP Photo)

Japanese android expert Hiroshi Ishiguro, left, talks with new talking robot Sota, right, Android robot Otonaroid, second left, and another talking robots CommU, center and second right, during a press event at the National Museum of Emerging Science and Innovation Miraikan in Tokyo Tuesday, January 20, 2015. Ishiguro, the scientist behind the new talking robot in Japan says people should stop expecting robots to understand them, and instead try to chime in with robotic conversations. Ishiguro's 28-centimer (11-inch) tall button-eyed Sota, which stands for “social talker”, is programmed to mainly talk with a fellow robot, and won't be trying too hard to understand human speech – the major, and often frustrating, drawback of companion robots. (Photo by Shizuo Kambayashi/AP Photo)

New talking robots Sota, center and right, and another talking robot CommU are shown together during a press event in Tokyo Tuesday, January 20, 2015. (Photo by Shizuo Kambayashi/AP Photo)

New talking robots CommU is held by Osaka University Assistant Prof. Yuichiro Yoshikawa during a press event in Tokyo Tuesday, January 20, 2015 as Android robot Otonaroid, center, another talking robot Sota, right, and two CommU robots are shown. (Photo by Shizuo Kambayashi/AP Photo)

Communication robot “CommU” sit on display during the press conference to introduce the sociable robots, “CommU” and “Sota”, hosted by only the robot science communicator Otonaroid and the robot anchor Kodomoroid at the National Museum of Emerging Science and Technology (Miraikan) on January 20, 2015 in Tokyo, Japan. CommU and Sota, developed to improve humanoids' sense of interaction in dialogue, make people feel more engaged in conversation with them by featuring diverse eye movements and gaze directions. (Photo by Ken Ishii/Getty Images)

Humanoid robot “Otonaroid” talks with “Kodomoroid” during the press conference to introduce the sociable robots, “CommU” and “Sota” hosted by only the robot science communicator Otonaroid and the robot anchor Kodomoroid at the National Museum of Emerging Science and Technology (Miraikan) on January 20, 2015 in Tokyo, Japan. (Photo by Ken Ishii/Getty Images)

In this February 20, 2014 file photo, a man exhales vapor from an e-cigarette in New York. Using certain electronic cigarettes at high temperature settings could release much more formaldehyde, a cancer-causing chemical, than smoking traditional cigarettes does, lab tests suggest. The research published in the New England Journal of Medicine on Wednesday, January 21, 2015 is not proof of a risk – it involved limited testing on just one brand of e-cigarettes. But scientists say it shows how little is known about the safety of these popular devices. (Photo by Frank Franklin II/AP Photo)

Zambians campaign in Lusaka, Monday, January 18, 2015,on the last day ahead of elections Tuesday, set to choose a new leader following the death of Micahael Sata, 77, who served as President of the Southern African country since 2011. He died in a London hospital on Oct. 28, 2014 after a long illness. (Photo by Tsvangirayi Mukwazhi/AP Photo)

A model wears a creation for Philipp Plein men's Fall – Winter 2015-2016 collection, part of the Milan Fashion Week, unveiled in Milan, Italy, Saturday, January 17, 2015. (Photo by Antonio Calanni/AP Photo)

A woman tries to comfort a horse knocked down after falling exhausted during a parade along a street of Caldas de Montbui, as they celebrate the feast of Saint Anthony the Abbot, the patron saint of domestic animals, on the outskirts of Barcelona, Spain, Sunday, January 18, 2015. (Photo by Emilio Morenatti/AP Photo)

A FEMEN activist, who is protesting against the financial world, discusses with police at the World Economic Forum in Davos, Switzerland, Thursday, January 22, 2015. The meeting runs from Jan. 21 through Jan. 24. (Photo by Michel Euler/AP Photo)

A FEMEN activist, who is protesting against the financial world, is led away by police at the World Economic Forum in Davos, Switzerland, Thursday, January 22, 2015. (Photo by Michel Euler/AP Photo)

An Indian woman shows her child makeshift tents of Hindu devotees at the confluence of the rivers Ganges, Yamuna and the mythical Saraswati, on the eve of “Mauni Amavasya” or new moon day, considered the most auspicious date of bathing during the annual month long Hindu religious fair “Magh Mela” in Allahabad, India, Monday, January 19, 2015. Hundreds of thousands of devout Hindus are expected to take holy dips at the confluence during the astronomically auspicious period of over 45 days celebrated as Magh Mela. (Photo by Rajesh Kumar Singh/AP Photo)

The aftermath of a bridge collapse on Interstate 75, Tuesday, Jan. 20, 2015 in Cincinnati, Ohio. The collapse killed a worker and injured a truck driver. The Ohio Department of Transportation said the busy artery through downtown Cincinnati will be closed at least two to three days. (AP Photo/The Enquirer, Liz Dufour)

A tourist films an Aldabra giant tortoise with a Go-Pro camera at a conservation compound on Changuu Island, northwest of Zanzibar, Tanzania, on Wednesday, January 21, 2015. The endangered species, some of which live longer than 100 years old, continues to be brought to the island for protection from theft and for better breeding. (Photo by Mosa'ab Elshamy/AP Photo)

Two-times Australian Open tennis champion Victoria Azarenka of Belarus uses a giant racquet to hit the ball during a charity event on Rod Laver Arena at Melbourne Park January 17, 2015. The Australian Open tennis tournament begins on January 19. (Photo by Issei Kato/Reuters)

An electric bicycle stops among cars while waiting at a traffic light on a hazy day in Xiangyang, Hubei province January 16, 2015. (Photo by Reuters/Stringer)

A person (C) believed by the State Coordinator of Teachers of Guerrero (CETEG) to be a government infiltrator, shows his injuries to the media after being exchanged for two CETEG members detained earlier in a protest against the upcoming July legislative elections and in support of the missing 43 students from Ayotzinapa teachers' training college in Chilpancingo, Guerrero January 16, 2015. (Photo by Jorge Dan Lopez/Reuters)

The relative (C) of a shooting victim reacts as she arrives at the crime scene at Las Torres neighbourhood in Tegucigalpa January 16, 2015. Unknown assailants gunned down two youth and injured one in an attack at the gang-infested area of the city, local media reported. (Photo by Jorge Cabrera/Reuters)

Pope Francis smiles as he waves to residents during a motorcade in Tacloban city, after holding a mass near the airport, January 17, 2015. An emotional Francis, wearing a plastic poncho over his vestments to protect him from the wind and rain on Saturday, comforted survivors of Typhoon Haiyan, the Philippines' worst natural disaster that killed about 6,300 people 14 months ago. (Photo by Erik De Castro/Reuters)

People gather around a plane that skidded off the runaway of Tacloban's airport, January 17, 2015. Senior cabinet and security officials of President Benigno Aquino administration are all safe after a plane carrying them overshoot the runway and skidded to a grassy area as the plane was taking off at Tacloban airport on Saturday, media reports said. The officials attended a mass by Pope Francis who cut short his visit due to a storm. (Photo by Damir Sagolj/Reuters)

A South Korea fan waits for the start of their Asian Cup Group A soccer match against Australia at the Brisbane Stadium in Brisbane January 17, 2015. (Photo by Edgar Su/Reuters)

An Iran fan cheers before the start of their Asian Cup Group C soccer match against UAE at the Brisbane Stadium in Brisbane January 19, 2015. (Photo by Edgar Su/Reuters)

Spectators smile before the Asian Cup quarter-final soccer match between China and Australia at the Brisbane Stadium in Brisbane January 22, 2015. (Photo by Edgar Su/Reuters)

Iran fans pose for pictures before the start of their Asian Cup Group C soccer match against UAE at the Brisbane Stadium in Brisbane January 19, 2015. (Photo by Edgar Su/Reuters)

Australia fans look on before the Asian Cup quarter-final soccer match between China and Australia at the Brisbane Stadium in Brisbane January 22, 2015. (Photo by Edgar Su/Reuters)

Viktor Troicki of Serbia leaps to high-five his coach, Australian Jack Reader, after defeating Mikhail Kukushkin of Kazakhstan in their men's singles final match at the Sydney International tennis tournament in Sydney, January 17, 2015. (Photo by Jason Reed/Reuters)

A demonstrators takes part in a German farmers and consumer rights activists march to protest against the Transatlantic Trade and Investment Partnership (TTIP), mass husbandry and genetic engineering in Berlin, January 17, 2015. (Photo by Fabrizio Bensch/Reuters)

Belgian paratroopers guard outside a Jewish school in the central city of Antwerp January 17, 2015. Security was tight at public buildings and Jewish districts in Brussels and Antwerp and the army provided 150 troops to bolster police presence, following a raid in an apartment in the city of Verviers. Belgian police killed two men who opened fire on them during one of about a dozen raids on Thursday against an Islamist group. (Photo by Yves Herman/Reuters)

Quad rider Rafal Sonik of Poland celebrates after winning the seventh South American edition of the Dakar Rally 2014 in Buenos Aires, after the 13th stage of the Dakar Rally 2015 from Rosario to Buenos Aires January 17, 2015. (Photo by Jean-Paul Pelissier/Reuters)

Children walk past charcoal sellers in Kitwe, Zambia January 17, 2015. (Photo by Rogan Ward/Reuters)

People from the minority Yazidi sect, wait inside a truck along a road on the outskirts of Kirkuk, Iraq January 17, 2015. Islamic State freed around 350 members of Iraq's Yazidi minority on Saturday, delivering them to safety in the country's Kurdish north. (Photo by Ako Rasheed/Reuters)