A member of the Patrouille Suisse flight team of the Swiss Air Force performs in his Northrop F-5 ll Tiger fighting jet during a media day of the Swiss Air Force at the airbase in the central Swiss town of Emmen April 17, 2015.

Arnd Wiegmann/Reuters

A member of the Patrouille Suisse flight team of the Swiss Air Force performs in his Northrop F-5 ll Tiger fighting jet during a media day of the Swiss Air Force at the airbase in the central Swiss town of Emmen on Friday

The greenhouses are seen on the grounds of the Belgian royal family residence of Laeken in Brussels April 17, 2015. The royal family opens its interlocking greenhouses with their wide array of flowers to the public every year, for a duration of three weeks.

Yves Herman/Reuters

The greenhouses are seen on the grounds of the Belgian royal family residence of Laeken in Brussels on Friday. The royal family opens its interlocking greenhouses with their wide array of flowers to the public every year, for a duration of three weeks

A man picks up metal scraps from a burnt out car outside the Jeppies Hostle, in the Jeppestown area of Johannesburg, on Friday. Twelve people were arrested overnight as anti-foreigner attacks in South Africa spread to parts of downtown Johannesburg.

Mujahid Safodien/AFP

A man picks up metal scraps from a burnt out car outside the Jeppies Hostle, in the Jeppestown area of Johannesburg, on Friday. Twelve people were arrested overnight as anti-foreigner attacks in South Africa spread to parts of downtown Johannesburg

A competitor is applied with fake tan before competing in the Mr. Thailand 2015 bodybuilding competition in Bangkok, Thailand, Friday, April 17, 2015. The three-day competition attracts more than 400 bodybuilding enthusiasts across the country.

Sakchai Lalit/AP

A competitor is applied with fake tan before competing in the Mr Thailand 2015 bodybuilding competition in Bangkok, Thailand on Friday

A relative of the victims of South Korea's Sewol ferry disaster is in a nose-to-nose stand-off with a policeman during an anti-government protest near the presidential residence in Seoul on April 17, 2015. Dozens of people continued their protests overnight after thousands of mourners rallied to mark the first anniversary of the disaster that claimed 304 lives.

Jung Yeon-Je/AFP

A relative of the victims of South Korea’s Sewol ferry disaster is in a nose-to-nose stand-off with a policeman during an anti-government protest near the presidential residence in Seoul on Friday

An Ultra-Orthodox Jewish Rabbis wear burlap sacks as a sign of mourning and blowing the Shofar  during a demonstration Prayer in Beit Shemesh, Israel, 16 April 2015. Hundreds of Ultra-Orthodox Jews protested against the construction of new housing units, believing they would be built at the site of ancient Jewish graves.

Abir Sultan/EPA

An Ultra-Orthodox Jewish Rabbis wear burlap sacks as a sign of mourning and blowing the Shofar during a demonstration Prayer in Beit Shemesh, Israel on Thursday. Hundreds of Ultra-Orthodox Jews protested against the construction of new housing units, believing they would be built at the site of ancient Jewish graves

SNP candidate for Perthshire South and Ochil, Tasmina Ahmed Sheikh, is joined by Alex Salmond, the SNP candidate for the Gordon constituency during campaigning on Thursday in Milnathort, Scotland

Jeff J Mitchell/Getty Images

SNP candidate for Perthshire South and Ochil, Tasmina Ahmed Sheikh, is joined by Alex Salmond, the SNP candidate for the Gordon constituency during campaigning on Thursday in Milnathort, Scotland

Palestinian Hussein Al-Najjar, 14-years-old, fills a donkey-pulled cart with recyclable waste and other items he collected, in hope to be able to sell them, at a garbage dump in Rafah, in the southern Gaza Strip on April 16, 2015.

Said Khatib/AFP

Palestinian Hussein Al-Najjar, 14-years-old, fills a donkey-pulled cart with recyclable waste and other items he collected, in hope to be able to sell them, at a garbage dump in Rafah, in the southern Gaza Strip on Thursday

A dog and supporters wait for the arrival of Labour Party leader Ed Miliband in Crouch End, north London as part of his General Election campaign tour.

Stefan Rousseau/PA

A dog and Labour supporters wait for the arrival of party leader Ed Miliband in Crouch End, north London as part of his general election campaign tour

Filipino linemen conduct preventive maintenance to electrical lines in a street in Manila, Philippines on Thursday. According to news reports, officials of the Philippines Energy department urged Filipinos to conserve electricity usage after it recorded its highest daily demand of 8,271 megawatts (MW) so far this year.

Ritchie B. Tongo/EPA

Filipino linemen conduct preventive maintenance to electrical lines in a street in Manila, Philippines. The Philippines energy department urged Filipinos to conserve electricity usage after it recorded its highest daily demand this year.

 Immigrants wait to apply for political asylum at the asylum service office in Athens, Greece, 16 April 2015. According to the Greek coast guard, the number of undocumented migrants entering Greece by sea reached 10,445 people in the first quarter of 2015, compared to 2,863 people for the same period last year. In March, 6,498 migrants managed to reach the shores of Greece's eastern Aegean islands alone, with Lesvos, Chios, Leros and Samos being their main destinations.

Simela Pantzartzi/EPA

Immigrants wait to apply for political asylum at the asylum service office in Athens, Greece

People relax in the sun in the gardens of the Palais Royal in Paris on April 15, 2015.

Loic Venance/AFP

People relax in the sun in the gardens of the Palais Royal in Paris on Wednesday

An aerial view of flower fields is seen near the Keukenhof park, also known as the Garden of Europe, in Lisse, The Netherlands on Wednesday. Keukenhof, employing some 30 gardeners, is considered to be the world's largest flower garden displaying millions of flowers every year

Yves Herman/Reuters

An aerial view of flower fields is seen near the Keukenhof park, also known as the Garden of Europe, in Lisse, The Netherlands on Wednesday. Keukenhof is considered to be the world’s largest flower garden displaying millions of flowers every year

Anthem of the Seas arrives in Southampton...The world's joint third largest cruise ship, MS Anthem of the Seas, owned by Royal Caribbean, arrives at berth 101 in Southampton Docks ahead of her naming ceremony on 20 April. PRESS ASSOCIATION Photo. Picture date: Wednesday April 15, 2015.

Andrew Matthews/PA

The world’s joint third largest cruise ship, MS Anthem of the Seas, owned by Royal Caribbean, arrives at berth 101 in Southampton Docks ahead of her naming ceremony

Palestinian girls walk past rubble of heavily damaged buildings on Wednesday in the eastern Gaza City neighborhood of Shejaiya which was destroyed during the 50-day war between Israel and Hamas militants in the summer of 2014.

Thomas Coex/AFP

Palestinian girls walk past rubble of heavily damaged buildings on Wednesday in the eastern Gaza City neighborhood of Shejaiya which was destroyed during the 50-day war between Israel and Hamas militants in the summer of 2014

A Papuan girl comforts her crying young sister in Wanam village, Papua province, Indonesia, Wednesday, April 15, 2015.

Dita Alangkara/AP

A Papuan girl comforts her crying young sister in Wanam village, Papua province, Indonesia on Wednesday

A worker attaches the name tag of a Buddhist who made donation to a lantern, for upcoming celebration of Buddha's birthday on May 25 at the Jogye temple in Seoul, South Korea, Wednesday, April 15, 2015.

Lee Jin-man/AP

A worker attaches the name tag of a Buddhist who made a donation to a lantern, for upcoming celebration of Buddha’s birthday in May at the Jogye temple in Seoul, South Korea on Wednesday

A worker lowers himself from a scaffold in front of a Hillary Clinton sign near her campaign headquarters in the Brooklyn borough of New York, April 14, 2015. An unknown entity placed  Don t say  signs outside Clinton's Brooklyn Heights headquarters before her announcement Sunday

Brendan McDermid/Reuters

A worker lowers himself from a scaffold in front of a Hillary Clinton sign near her campaign headquarters in the Brooklyn borough of New York on Tuesday

US Marines stand at attention during the military exercise 'Platinum Lion 15-2' at the Novo Selo military base near the town of Sliven, some 290 kms from Sofia, Bulgaria on Tuesday. Bulgaria and the US are holding the joint military training at the Novo Selo site in Eastern Bulgaria, as part of the Bulgarian-American plan for joint military trainings and exercises scheduled in 2015

Vassil Donev/EPA

US Marines stand to attention during a military exercise at the Novo Selo military base near the town of Sliven, 290 km from Sofia, Bulgaria

Stars are pictured over the famous Matterhorn mountain, seen from the Riffelberg area, in Zermatt, Switzerland.

Jean-Christophe Bott/Keystone/AP

Stars seen in the sky over the Matterhorn mountain, seen from the Riffelberg area, in Zermatt, Switzerland