Members of the Samaritan sect take part in a traditional pilgrimage marking the holiday of Passover on Mount Gerizim, near the West Bank city of Nablus May 9, 2015. The Samaritans, who trace their roots to the Biblical kingdom of Israel in what is now the northern occupied West Bank, observe religious practices similar to those of Judaism. (Photo by Abed Omar Qusini/Reuters)

In this October 23, 2014 file photo, Egyptian garbage collectors carry paper on a truck as they sift through garbage in Cairo, Egypt. Egypt's justice minister, Mahfouz Saber, raised an uproar after he said in a Sunday, May 10, 2015, television interview that the children of sanitation workers are too lowly to become judges, saying those who join the judiciary must hail from “appropriate” backgrounds. The comments brought a heavy backlash on social media from Egyptians denouncing elitism – and what some saw as the arrogance of Egypt's judiciary. (Photo by Hassan Ammar/AP Photo)

People walk past artists depicting World War Two Soviet soldiers, during Victory Day commemorations in Almaty, Kazakhstan, May 9, 2015. (Photo by Shamil Zhumatov/Reuters)

People wearing old uniforms take part in celebrations to mark Victory Day, at the Soviet War Memorial in Treptower Park in Berlin, Germany, May 9, 2015. (Photo by Fabrizio Bensch/Reuters)

Children play on top of a historical Soviet T34 tank during celebrations to mark Victory Day at the Soviet War Memorial near the Reichstag building, in Tiergarten district of Berlin, Germany, May 9, 2015. (Photo by Fabrizio Bensch/Reuters)

People wearing old uniforms take part in celebrations to mark Victory Day, at the Soviet War Memorial in Treptower Park in Berlin, Germany, May 9, 2015. (Photo by Fabrizio Bensch/Reuters)

Local residents walk past collapsed houses after the April 25 earthquake, at Lamosangu village in Sindhupalchowk, Nepal, May 9, 2015. (Photo by Athit Perawongmetha/Reuters)

A woman wears a hat with medals and badges as she attends Victory Day celebrations in front of the Soviet Army monument in central Sofia, Bulgaria May 9, 2015. (Photo by Stoyan Nenov/Reuters)

World War Two veterans sit together on a bench as one of them holds up a picture of Joseph Stalin during Victory Day celebrations in Tbilisi, Georgia, May 9, 2015. (Photo by David Mdzinarishvili/Reuters)

North Korean leader Kim Jong Un watches the test-fire of a strategic submarine underwater ballistic missile (not pictured), in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang on May 9, 2015. North Korea said on Saturday it has successfully conducted an underwater test-fire of a submarine-launched ballistic missile, which, if true, would indicate progress in the secretive state's pursuit of building missile-equipped submarines. The North's leader Kim Jong Un oversaw the test-launch from a location off-shore as the submarine dove under water and “a ballistic missile surfaced from the sea and soared into the air, leaving a fiery trail of blaze”, the official KCNA news agency said. (Photo by Reuters/KCNA)

Larry the Downing Street cat walks outside 10 Downing street in London, Britain, May 9, 2015. (Photo by Stefan Wermuth/Reuters)

Recruits from the presidential regiment take part in Victory Day celebrations in the Museum of the Great Patriotic War in Kiev, Ukraine May 9, 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 Gleb Garanich/Reuters)

People lay flowers at the Tomb of the Unknown Soldier next to a portrait of Soviet leader Joseph Stalin during a ceremony commemorating the 70th anniversary of the end of the World War Two in Kiev, Ukraine, May 9, 2015. (Photo by Valentyn Ogirenko/Reuters)

Slovakia's supporters cheer during their team's Ice Hockey World Championship game against Finaland at the CEZ arena in Ostrava, Czech Republic May 9, 2015. (Photo by Laszlo Balogh/Reuters)

Football, Crystal Palace vs Manchester United – Barclays Premier League, Selhurst Park on May 9, 2015: General view of the Crystal Palace eagle. (Photo by Tony O'Brien/Reuters)

Protesters and police face off at the gates of Downing Street during a protest against the Conservative Party in central London, May 9, 2015. (Photo by Stefan Wermuth/Reuters)

Protesters run during a demonstration against the Conservative Party in central London, May 9, 2015. Protesters threw bottles, cans and smoke bombs at riot police in central London on Saturday in a demonstration against the re-election of Britain's Conservative Prime Minister David Cameron. (Photo by Stefan Wermuth/Reuters)

Youths watch dancers performing Passinho, or “little step”, during an event organized by Amnesty International in Rio de Janeiro May 9, 2015. (Photo by Pilar Olivares/Reuters)

A transgender performs during the Eighth Annual March against Homophobia and Transphobia in Havana, May 9, 2015. More than 1,000 gay, lesbian and transgender Cubans marched through Havana on Saturday, proudly displaying their truest selves for a day in a society where they still endure discrimination. (Photo by Alexandre Meneghini/Reuters)

Members of Cuba's LGBT community take part in a gay pride parade in Havana, Cuba, Saturday, May 9, 2015. The event is part of official ceremonies leading up to the Global Day against Homophobia on May 17. (Photo by Desmond Boylan/AP Photo)

A vendor sells Guy Fawkes masks during a demonstration to celebrate the resignation of Guatemalan Vice President Roxana Baldetti, and to demand the resignation of President Otto Perez Molina, outside Congress in Guatemala City, May 9, 2015. Baldetti resigned on May 8 to face an investigation over her alleged involvement in a customs corruption racket, amid a scandal that has hurt the ruling party ahead of elections. (Photo by Jorge Dan Lopez/Reuters)

Local residents pray as they queue up for relief supplies distributed by international aid organisation after the April 25 earthquake in Bhaktapur, Nepal, May 10, 2015. (Photo by Athit Perawongmetha/Reuters)

A captain from the Royal Regiment Of Fusiliers speaks with tourists on the final day of 70th anniversary Victory in Europe (VE) day commemorations in central London May 10, 2015. (Photo by Peter Nicholls/Reuters)

German Chancellor Angela Merkel (L) gestures as Russian President Vladimir Putin looks on during a news conference after talks at the Kremlin in Moscow, Russia, May 10, 2015. Russian President Vladimir Putin said on Sunday that a peace deal agreed in Minsk over the separatist conflict in east Ukraine was moving forward despite problems and that it had been quieter in Ukraine recently. Putin made the comments at a news conference in Moscow with Germany's Angela Merkel. (Photo by Sergei Ilnitsky/Reuters)

Russian President Vladimir Putin (C) and German Chancellor Angela Merkel (L) talk to a girl after attending a wreath-laying ceremony at the Tomb of the Unknown Soldier by the Kremlin walls in Moscow, Russia, May 10, 2015. Tanks and troops paraded across Moscow's Red Square on May 9 to mark the 70th anniversary of victory over Nazi Germany, an event boycotted by Western leaders over Russia's role in the Ukraine crisis. German Chancellor Angela Merkel skipped the parade, as did U.S. President Barack Obama and the French and British leaders, but attended a wreath-laying ceremony in Moscow on Sunday. (Photo by Reuters/Host Photo Agency/RIA Novosti)

German Chancellor Angela Merkel and Russian President Vladimir Putin attend a flower-laying ceremony at the Tomb of the Unknown Soldier by the Kremlin walls in Moscow, Russia, May 10, 2015. (Photo by Grigory Dukor/Reuters)

Lithuania's riot police special unit ARAS officer (front) and Lithuania's army rapid reaction unit officers attend the Zaibo Kirtis (Lightning Strike) joint anti-riot drill in Svencioneliai, Lithuania, May 10, 2015. Some 3,000 troops will be involved in this week's “Lightning Strike” exercise, simulating a response to armed groups seizing local government buildings, weapons stockpiles and airports to form a separatist government, as happened in Crimea and other parts of Ukraine. (Photo by Ints Kalnins/Reuters)

People wearing period clothing dance in St James's Park on the final day of the 70th anniversary Victory in Europe (VE) Day commemorations in central London May 10, 2015. Picture taken through a mesh fence. (Photo by Kevin Coombs/Reuters)

People wearing period clothing dance in St James's Park on the final day of the 70th anniversary Victory in Europe (VE) day commemorations in central London May 10, 2015. (Photo by Kevin Coombs/Reuters)

People wearing period clothing dance in St James's Park on the final day of the 70th anniversary Victory in Europe (VE) Day commemorations in central London May 10, 2015. (Photo by Kevin Coombs/Reuters)

Russia's Artemi Panarin celebrates after scoring the winning goal against Slovakia during their Ice Hockey World Championship game at the CEZ arena in Ostrava, Czech Republic May 10, 2015. (Photo by Laszlo Balogh/Reuters)

Members of civil society organisations chant slogans during a protest to condemn the killing of 27-year-old woman, Farkhunda, who was beaten with sticks and set on fire by a crowd of men in central Kabul in broad daylight on Thursday, in Kabul, in this file picture taken March 24, 2015. Powerful religious leaders in Afghanistan are growing uneasy about the challenge to their authority posed by rare civil rights protests in Kabul and widespread anger over the lynching of Farkhunda, a young woman wrongly accused of burning a Koran. (Photo by Omar Sobhani/Reuters)

Sasha Kutsenko from Ukraine performs a dive during the FINA High Diving World Cup in Cozumel, Mexico, May 10, 2015. (Photo by Victor Ruiz Garcia/Reuters)

Women prepare flower petals at the altar of the Virgin of the Rosary prior to a procession during the celebration of the Palms and Flowers Festival in Panchimalco May 10, 2015. Panchimalco residents celebrate this annual festival to ask for a good harvest, at the start of the rain season. (Photo by Jose Cabezas/Reuters)

Commander (L) of an honour guards gestures as he prepares his troops before a welcoming ceremony for the visiting Bulgarian President Rosen Plevneliev (not pictured) outside the national parliament building at Sukhbaatar square, in Ulan Bator, Mongolia, May 11, 2015. (Photo by B. Rentsendorj/Reuters)

Residents walk on a muddy road next to vehicles pushed up to a wall by floodwater, after heavy rainfall hit Yudong township of Zhenxiong county, Yunnan province May 11, 2015. At least one person was killed and two remain missing after severe rainstorms hit the township on Sunday, local media reported. (Photo by Reuters/China Daily)

Sonya Baumstein stands in her 23-foot (7.01 meter) carbon and kevlar solo rowboat in this handout picture courtesy of Andrew Cull in Port Townsend, Washington April 12, 2015. In May 2015, Baumstein will attempt a 6,000-mile (9,600 km) crossing of the Pacific Ocean – a feat no woman has ever accomplished solo. (Photo by Andrew Cull/Reuters)

Trees grow in the shape of chairs in the garden of Austrian artist Bernhard Schmid in Lassnitzhoehe, Styria province, Austria, May 5, 2015. Schmid creates chairs naturally grown from one single piece of either maple, hazelnut or hornbeam wood by letting the trees grow into their final design over some 20 years. No nails, screws or glue is used in the process. (Photo by Heinz-Peter Bader/Reuters)

Austrian artist Bernhard Schmid works on tree being grown into a chair shape in his garden in Lassnitzhoehe, Styria province, Austria, May 5, 2015. (Photo by Heinz-Peter Bader/Reuters)

Austrian artist Bernhard Schmid works on tree being grown into a chair shape in his garden in Lassnitzhoehe, Styria province, Austria, May 5, 2015. (Photo by Heinz-Peter Bader/Reuters)

Austrian artist Bernhard Schmid places chairs which were naturally grown from trees in his garden in Lassnitzhoehe, Styria province, Austria, May 5, 2015. (Photo by Heinz-Peter Bader/Reuters)

Maya Tamang, 20, delivers her daughter after the earthquake at a temporary makeshift outside Bhaktapur hospital in Bhaktapur, Nepal, May 12, 2015. At three people were killed and more than 300 injured in Nepal after a magnitude 7.3 earthquake shook the Himalayan nation on Tuesday, police said. The latest casualties came just weeks after a devastating quake, with a magnitude of 7.8, killed more than 8,000 people in Nepal and damaged hundreds of thousands of buildings. (Photo by Athit Perawongmetha/Reuters)

The Villarrica Volcano is seen at night in Pucon town, Chile, May 10, 2015. Villarrica, located near the popular tourist resort of Pucon, is among the most active in South America. (Photo by Cristobal Saavedra/Reuters)

A combination of photos shows gay-themed traffic lights in Vienna May 11, 2015. The traffic lights are intended to get the city into the mood for the annual Eurovision Song Contest, one of the world's most popular kitsch cultural events which this year is being hosted by the Austrian capital. Dozens of traffic lights in central Vienna have been programmed to show male or female gay couples with hearts – in red for stop and green for go – replacing the usual single, gender-neutral figure. (Photo by Heinz-Peter Bader/Reuters)

Shelby Van Sickle pauses while trying to salvage personal items in the family home that was destroyed after a tornado touched down overnight in Van, Texas, USA, 11 May 2015. Multiple storms moved across the state of Texas over the weekend causing flash flooding and tornados. (Photo by Larry W. Smith/EPA)

Aldyn Roan and David Arce (top) mount an American flag to a broken tree trunk in front of the Arce home after a tornado swept through the area the previous night in Van, Texas May 11, 2015. (Photo by Mike Stone/Reuters)

Tourists stand next to the carcass of a beached young gray whale, Eschrichtius robustus, lying on the shore of Popotla beach in Rosarito, Baja California state, May 11, 2015. The 15-meter (49-foot) and 14-ton gray whale is the second cetacean found dead on the coast of Baja California in less than a week, the other appeared four days ago in Playas de Tijuana, local media reported. (Photo by Jorge Duenes/Reuters)

Free Syrian Army fighters cover their ears as they fire a rocket towards forces loyal to Syria's President Bashar Al-Assad in Deraa countryside May 11, 2015. (Photo by Alaa Al-Faqir/Reuters)

Elaine Vandiver shares a moment with a two-year old alpaca as they touch noses as she washes him at her farm at 1560 Stateline Road Monday, May 11, 2015, in Walla Walla, Wash. (Photo by Michael Lopez/Walla Walla Union-Bulletin via AP Photo)

Orica Greenedge rider Simon Gerrands of Australia receives kisses after winning in the 17.6 km (11 miles) team time-trial first stage of the 98th Giro d'Italia (Tour of Italy) cycling race from San Lorenzo a Mare to Sanremo, Italy, May 9, 2015. (Photo by Fabio Ferrari/Reuters/LaPresse)