Zhao Xiaoyang's mother wipes her tears as Zhao sits inside a cage after having breakfast at their home in Fangjia village, Zhejiang province May 6, 2015. Zhao has been living in a cage after he was diagnosed with mental disorder in 2001 and had beaten a man to death. For years, his mother cooks him meals and takes care of his personal hygiene. (Photo by William Hong/Reuters)

Zhao Xiaoyang smokes inside a cage at his home in Fangjia village, Zhejiang province May 6, 2015. (Photo by William Hong/Reuters)

U.S. soldiers of the 2nd Battalion, 7th Infantry Regiment, “Cottonbalers”, who are deployed in Latvia, take part in a training exercise with M1A2 “Abrams” tank in Adazi military base, Latvia, May 7, 2015. (Photo by Ints Kalnins/Reuters)

U.S. soldiers of the 2nd Battalion, 7th Infantry Regiment, “Cottonbalers”, who are deployed in Latvia, take part in a training exercise with M1A2 “Abrams” tank in Adazi military base, Latvia, May 7, 2015. (Photo by Ints Kalnins/Reuters)

A U.S. soldier of the 2nd Battalion, 7th Infantry Regiment, “Cottonbalers”, who are deployed in Latvia, walks past a M1A2 “Abrams” tank during a training exercise in Adazi military base, Latvia, May 7, 2015. (Photo by Ints Kalnins/Reuters)

Miroslav Simchich (C), a veteran of the Ukrainian insurgent army (UPA), and Iraida Kibitkina (L) and Ivan Zaluzhny, World War Two veterans, shake hands during a meeting dedicated to the 70th anniversary of World War Two at the National Museum of the History of the Great Patriotic War of 1941-1945 years in Kiev, May 6, 2015. Spurning what is expected to be a display of military swagger in Moscow on Saturday, Kiev plans to put the accent at home on reconciliation rather than triumphalism and victory. But some Ukrainians fear associating the struggle in World War Two with today's struggle against Russia will deepen splits in a politically divided population and hand propaganda gifts to Moscow, which equates Kiev with treachery and fascism. (Photo by Oleksandr Klymenko/Reuters)

A Ukrainian cadet lays flowers at the Museum of Great Patriotic War during a patriotic forum “Two Generations – Two Wars” in Kiev, Ukraine May 5, 2015. (Photo by Valentyn Ogirenko/Reuters)

Local artists draw patterns in the sand at low tide on North Beach, Tenby, South Wales, May 7, 2015. (Photo by Rebecca Naden/Reuters)

Local artists draw patterns in the sand at low tide on North Beach, Tenby, South Wales, May 7, 2015. (Photo by Rebecca Naden/Reuters)

Gyalwang Drukpa, a Buddhist leader from South Asia, prays in front of a mural of Freddie Gray in Baltimore, Maryland, May 7, 2015. Gray, 25, sustained spinal injuries after being arrested and died on April 19. (Photo by Carlos Barria/Reuters)

People visit the “Stalin Line” memorial, where collected samples of military equipment from the time of the World War Two to the present day are displayed, near the village of Goroshki, west of Minsk, May 7, 2015. Belarus will mark the 70th anniversary of their victory over Nazi Germany on May 9 this year. (Photo by Vasily Fedosenko/Reuters)

Servicemen of the U.S. Army's 173rd Airborne Brigade Combat Team (bottom and R) train members of the Ukrainian National Guard during a joint military exercise called “Fearless Guardian 2015” at the International Peacekeeping and Security Center near the western village of Starychy, Ukraine, May 7, 2015. About 290 U.S. Army paratroopers arrived in western Ukraine to train three battalions of Ukrainian national guard troops in the spheres of intelligence, logistics, medical care and others, according to the government forces of Ukraine. (Photo by Roman Baluk/Reuters)

Servicemen of the U.S. Army's 173rd Airborne Brigade Combat Team (standing) train members of the Ukrainian National Guard during a joint military exercise called “Fearless Guardian 2015” at the International Peacekeeping and Security Center near the western village of Starychy, Ukraine, May 7, 2015. (Photo by Roman Baluk/Reuters)

A NYPD police officer arrives for the wake of officer Brian Moore at the Fredrick J. Chapey and Sons Funeral Home in Bethpage, New York, May 7, 2015. The New York City plainclothes police officer who was shot in the head died on Monday, the fifth officer gunned down in as many months amid anti-law enforcement sentiment not seen since the turbulent 1960s, Police Commissioner Bill Bratton said. (Photo by Shannon Stapleton/Reuters)

Police officers hang a banner honoring NYPD officer Brian Moore outside his wake at the Fredrick J. Chapey and Sons Funeral Home in Bethpage, New York, May 7, 2015. (Photo by Shannon Stapleton/Reuters)

NYPD police officers stand outside the wake of officer Brian Moore at the Fredrick J. Chapey and Sons Funeral Home in Bethpage, New York, May 7, 2015. (Photo by Shannon Stapleton/Reuters)

A visitor looks at a plastinated human body during a press preview prior to the opening of “Human Bodies” exhibition in Oviedo, Spain, May 7, 2015. (Photo by Eloy Alonso/Reuters)

A visitor looks at a plastinated human body during a press preview prior to the opening of “Human Bodies” exhibition in Oviedo, Spain, May 7, 2015. (Photo by Eloy Alonso/Reuters)

A visitor looks at a plastinated human body during a press preview prior to the opening of “Human Bodies” exhibition in Oviedo, Spain, May 7, 2015. (Photo by Eloy Alonso/Reuters)

A visitor looks at a plastinated human body during a press preview prior to the opening of “Human Bodies” exhibition in Oviedo, Spain, May 7, 2015. (Photo by Eloy Alonso/Reuters)

A visitor looks at plastinated human bodies during a press preview prior to the opening of “Human Bodies” exhibition in Oviedo, Spain, May 7, 2015. (Photo by Eloy Alonso/Reuters)

A float is illuminated over Zocalo Square during the International Festival of Lights in downtown Mexico City May 7, 2015. (Photo by Edgard Garrido/Reuters)

People watch the artistic lighting on a figure near the Fine Arts Palace during the beginning of the International Lights Festival of Mexico (FILUX) in Mexico City, Mexico, 07 May 2015. (Photo by Maruio Guzman/EPA)

A girl cries as an Alebrije, a folk art sculpture of mythical creatures, follows during the International Festival of Lights in downtown Mexico City May 7, 2015. (Photo by Edgard Garrido/Reuters)

The figure of an eight-year-old boy is seen inside a suitcase on a Spanish civil guard scanner screen at the border between Morocco and Spain's north african enclave Ceuta, Spain in this handout photo released May 8, 2015. A 19-year-old woman was arrested May 7, 2015 for the attempted smuggling of the boy, who was checked by medics and handed over to juvenile prosecutors office, according to authorities. (Photo by Reuters/Ministerio Del Interior)

A youth wears the uniform of a World War Two veteran as he walks past a banner depicting Avigdor Lieberman, head of the Yisrael Beiteinu party, during a parade marking the upcoming Victory Day, the anniversary of the Allied victory over Nazi Germany, in the southern city of Ashdod, Israel, May 8, 2015. Victory Day falls on May 9, with this year marking the 70th anniversary of the Allied victory. (Photo by Amir Cohen/Reuters)

An Israeli soldier holds a photograph of a World War Two veteran during a parade marking the upcoming Victory Day, the anniversary of the Allied victory over Nazi Germany, in the southern city of Ashdod, Israel, May 8, 2015. (Photo by Amir Cohen/Reuters)

World War Two veterans walk past Israeli naval officers during a parade marking the upcoming Victory Day, the anniversary of the Allied victory over Nazi Germany, in the southern city of Ashdod, Israel, May 8, 2015. (Photo by Amir Cohen/Reuters)

Four-year-old British Bulldog “Bobo” skateboards past office workers during evening rush hour at Singapore's central business district May 8, 2015. The dog, which can skateboard independently, was brought to the business district by its owner as part of a promotion for a luxury pet hotel and resort. (Photo by Edgar Su/Reuters)

Alexei Samokhin, a 90-year-old World War Two veteran and companion of the Order of Glory, cleans his medals at his apartment as he prepares for the upcoming Victory Day, the 70th anniversary of the end of World War Two, in the Siberian town of Divnogorsk, Russia May 7, 2015. The Order of Glory is the Soviet Army's highest acknowledgement for bravery in the face of the enemy. Samokhin, who served as a signaller and a scout, took part in many battles of the Red Army as a soldier, including Operation Bagration in Belarus and Western Ukraine, battles for Warsaw and for Berlin. The end of World War Two found him in Germany on the river Elbe, where he met with U.S. Army soldiers. (Photo by Ilya Naymushin/Reuters)

Brazilian soldiers participate in a commemorative ceremony marking the 70th anniversary of the end of the World War Two in front of Planalto Palace in Brasilia, Brazil May 8, 2015. (Photo by Ueslei Marcelino/Reuters)

Model Theodora Richards attends Pioneer Works 2nd Annual Village Fete presented by BOMBAY SAPPHIRE GIN at Pioneer Works Center for Art + Innovation on May 3, 2015 in New York City. (Photo by Craig Barritt/Getty Images for BOMBAY SAPPHIRE GIN)

Men dressed as samurai warriors in armor walk out after the Kachiya Festival at Katori Shrine in Tokyo Tuesday, May 5, 2015. The festival celebrates that the warlord Fujiwara Hidesato made for victory over warload Taira no Masakado's revolt in 940 during the Heian Period (794-1185) and then, Fujiwara dedicated a “kachiya” or victory arrow to the shrine. (Photo by Eugene Hoshiko/AP Photo)

In this photo taken on Saturday, May 2, 2015, a view of the Slovakian pavilion at the Expo 2015 in Rho, near Milan, Italy. At Milan Expo 2015, it's still an analog world, after all. Undoubtedly, the overarching theme of food, nutrition and sustainability at the Milan world's fair, which opened May 1 for a six-month run, guarantees a tactile, sensory and even culinary experience that by definition is more real than virtual even in this social media-fueled era. Yes, technology is employed for every manner of awe-inspiring immersive and interactive experience, and anyone with a smart phone can download a gaggle of apps meant to enhance and organize visits to the site itself and to the individual pavilions. (Photo by Antonio Calanni/AP Photo)

A newly-wed couple rides a rickshaw after their traditional wedding ceremony at Asakusa Shrine in the compound of Sensoji Temple at Asakusa district in Tokyo Wednesday, May 6, 2015. Asakusa is an old town in the capital that draws many tourists from across the world. (Photo by Eugene Hoshiko/AP Photo)

Stained glass foreman Jim Edbrooke lifts a restored stained glass panel in a protective frame for installation in St. Patrick's Cathedral in New York on Wednesday, May 6, 2015. (Photo by Mary Altaffer/AP Photo)

Chance Forney (L) kisses Sam Hunsicker (C-L) as church members wrap them and others in ribbons from a maypole during a Beltaine celebration at Four Quarters Interfaith Sanctuary in Artemas, Pennsylvania, USA, 02 May 2015. The sanctuary, which has hundreds of members, bills itself as a “safe and sacred ceremonial space for the modern practice of ancient religion”. (Photo by Jim Lo Scalzo/EPA)

Tourists pose for underwear photo in front of the reflecting pool of the National Congress in Brasilia on May 8, 2015. The act happened quickly and was not reprimanded by security. (Photo by Givaldo Barbosa/Agência O Globo)

A soldier stands between demonstrators and riot police facing off in the Musaga district of Bujumbura, Burundi, Monday May 4, 2015. Anti-government demonstrations resumed in Burundi's capital after a weekend pause as thousands continue to protest the president's decision to seek a third term. (Photo by Jerome Delay/AP Photo)

A protester wears a mask made from a leaf in the Cibitoke neighbourhood of Bujumbura on May 5, 2015. Protesters in Burundi dismissed a constitutional court ruling that cleared President Pierre Nkurunziza to run for a controversial third term, as the government offered to release activists if deadly demonstrations stopped. (Photo by Phil Moore/AFP Photo)

Residents argue with a police officer in the Mutakara district of Bujumbura, Burundi, Monday, May 4, 2015. (Photo by Jerome Delay/AP Photo)

Men duck for cover as shots are fired in Bujumbura, Burundi, Monday, May 4, 2015. (Photo by Jerome Delay/AP Photo)

Riot police chase a demonstrator in Bujumbura, Burundi, Monday, May 4, 2015. (Photo by Jerome Delay/AP Photo)

A demonstrator faces police in the Musaga district of Bujumbura, Burundi, Tuesday May 5, 2015. The Constitutional court validated President Pierre Nkurunziza's decision to seek a third term, amid violent street protests. (Photo by Jerome Delay/AP Photo)

Demonstrators face off with riot police in the Musaga district of Bujumbura, Burundi, Monday, May 4, 2015. (Photo by Jerome Delay/AP Photo)

A man poses with a wooden rifle in the Musaga neighbourhood in Bujumbura, Burundi on May 5, 2015. Burundi, where a 13-year civil war between Tutsis and Hutus ended only in 2006, has been rocked by violent protests since the ruling party designated President Pierre Nkurunziza to run in elections for a third term, in apparent defiance of the constitution and the Arusha accords which ended the war. (Photo by Phil Moore/AFP Photo)

Police clear and secure a barricade in the Kinindo district of Bujumbura, Burundi, Wednesday May 6, 2015. Anti-government demonstrations continue Wednesday and protesters regularly set road blocks in Burundi's capital to protest after the constitutional court validated President Pierre Nkurunziza's decision to seek a third term in office. (Photo by Jerome Delay/AP Photo)

A soldier walks along with demonstrators shouting at police dismantling a barricade in the Kanyosha district of Bujumbura, Burundi, Wednesday May 6, 2015. (Photo by Jerome Delay/AP Photo)

A Demonstrator blows his whistle in the Kanyosha district of Bujumbura, Burundi, Wednesday May 6, 2015. (Photo by Jerome Delay/AP Photo)

A Buddhist monk takes part in the traditional “hi-watari”, or fire-walking ritual, at Shiofune-kannonji temple in Ome City, Tokyo on May 3, 2015. Hundreds of people followed Buddhist ascetics and participated in fire walking to “purify the mind and body” and to pray for good health and safety. (Photo by Kazuhiro Nogi/AFP Photo)

A staff member of Madame Tussauds Berlin, prepares the waxwork replica of Darth Vader and Stormtrooper for the coming exhibition of “Star Wars” at Madame Tussauds Berlin in Berlin, Germany, 07 May 2015. The exhibition will open to the public on 12 May. (Photo by Jens Kalaene/EPA)

A large herd of grey cattle and buffalos move across a bridge over River Tisza as they are driven from their winter habitat in Tiszaug to their summer pasture in Tiszaalpar, Hungary, 02 May 2015. Grey cattle is an ancient, indigenous Hungarian species reared traditionally in the open air in the pusztas of the eastern half of Hungary all the year round. (Photo by Sandor Ujvari/EPA)

Smoke rises from a fire at a warehouse in south Columbus, Ohio on Friday, May 1, 2015. Officials said one-third to one-half of the city's firefighters were battling the fire, and thousands of nearby residents were without power. (Photo by Craig Holman/Columbus Dispatch via AP Photo)

Shelby Breaux of North Vermillion dives to keep a ball from getting past the infield against John Curtis during the Class 3A LHSAA FastPitch 56 softball tournament at Frasch Park in Sulphur, La. on Saturday, May 2, 2015. (Photo by Kirk Meche/The American Press via AP Photo)

A Palestinian farmer watches Israeli troops during a military exercise in the West Bank village of Khirbet al-Tawil, near Nablus, 03 May 2015. Crops are threatened as the Israeli Army conducts wide-scale drills in the region, according to media reports. (Photo by Alaa Badarneh/EPA)