Soldiers stand guard in front of the Tsitsernakaberd Memorial in Yerevan

Kirill Kudryavtsev/AFP/Getty

Soldiers stand guard in front of the Tsitsernakaberd Memorial in Yerevan, during a commemoration ceremony for the 100th anniversary of the Armenian genocide.

Smoke and ash rise from the Calbuco volcano as seen from the city of Puerto Montt, April 22, 2015. The Calbuco volcano in southern Chile erupted for the first time in more than five decades on Wednesday, sending a thick plume of ash and smoke several kilometres into the sky.

Sergio Candia/Reuters

Smoke and ash rise from the Calbuco volcano as seen from the city of Puerto Montt. The volcano in southern Chile erupted for the first time in more than five decades, sending a thick plume of ash and smoke into the sky.

Workers clean windows of an office building above panda installations on display, in Taiyuan, Shanxi province, April 22, 2015. About 280 panda installations were displayed at a square outside a shopping mall

Jon Woo/Reuters

Workers clean the windows of an office building above panda installations, in Taiyuan, Shanxi province, China. About 280 panda installations were displayed at a square outside a shopping mall

Lawmaker Ronny Tong sits beside placards left by pro-democracy lawmakers, after they left to boycott Hong Kong Chief Secretary Carrie Lam during a Legislative Council meeting in Hong Kong April 22, 2015. The Hong Kong government unveiled a long-awaited electoral blueprint for selecting the city's next leader to lawmakers on Wednesday, in a plan that reflected China's desire for a tightly controlled poll that is likely to rile democracy activists.

Bobby Yip/Reuters

Lawmaker Ronny Tong sits beside placards left by pro-democracy lawmakers after they boycotted Hong Kong Chief Secretary Carrie Lam during a Legislative Council meeting in Hong Kong. The Hong Kong government on Wednesday unveiled a long-awaited electoral blueprint for selecting the city’s next leader, in a plan that reflected China’s desire for a tightly controlled poll that is likely to rile democracy activists

Ukrainian military pilot Nadezhda Savchenko stands inside a defendants' cage as she attends a court hearing in Moscow April 17, 2015. Pro-Russian separatists battling Kiev's forces captured Savchenko last June and handed her over to Moscow, where she is being held on charges of aiding the killing of two Russian journalists in eastern Ukraine

  © Maxim Zmeyev/Reuters

Ukrainian military pilot Nadezhda Savchenko stands inside a defendants’ cage as she attends a court hearing in Moscow. Pro-Russian separatists battling Kiev’s forces captured Savchenko last June and handed her over to Moscow, where she is being held on charges of aiding the killing of two Russian journalists in eastern Ukraine.

A model presents a creation from Lino Villaventura Summer 2016 Ready To Wear collection during Sao Paulo Fashion Week in Sao Paulo

Paulo Whitaker/Reuters

A model presents a creation from Lino Villaventura Summer 2016 Ready To Wear collection during Sao Paulo Fashion Week in Sao Paulo

 Palestinian refugees reviewing their Parkour skills at Al-Namssawi neighborhood, south of Khan Younis town, southern Gaza Strip

Mohammed Saber/EPA

Palestinian refugees reviewing their Parkour skills at Al-Namssawi neighborhood, south of Khan Younis town, southern Gaza Strip

Ukrainian servicemen take part in a military drill in the Zhytomyr region, some 150 kms from Kiev

Anatolii Stepanov/AFP/Getty Images

Ukrainian servicemen take part in a military drill in the Zhytomyr region, 150 km from Kiev 

View of the Alemao complex in Rio de Janeiro, Brazil. Fresh violence in Rio's slums has led to growing doubts over the effectiveness of Brazil's seven-year-old strategy of "pacifying" districts in thrall to gangs and drug traffickers

Yasuyoshi Chiba/AFP/Getty Images

View of the Alemao complex in Rio de Janeiro, Brazil. Fresh violence in Rio’s slums has led to growing doubts over the effectiveness of Brazil’s seven-year-old strategy of “pacifying” districts in thrall to gangs and drug traffickers.

Construction workers Alex Hernandez (R) and Raul Buenrostro (L) begin demolition of a swimming pool at an apartment complex on April 8, 2015 in Hayward, California.  As California enters its fourth year of severe drought, some California residents are opting to have their home swimming pools removed as they face a mandatory 25 percent reduction in water use.

Justin Sullivan/Getty Images

Construction workers begin demolition of a swimming pool at an apartment complex in Hayward, California as the state enters its fourth year of drought. Some residents are having their pools removed as they face a mandatory 25% reduction in water use.

A flight crew member attaches a Japanese national flag on the airplane for Emperor Akihito and Empress Michiko's special flight to Palau before it's take off at Haneda international airport in Tokyo

Issei Kato/Reuters

A flight crew member attaches a Japanese national flag on the airplane for Emperor Akihito and Empress Michiko’s special flight to Palau before it’s take off at Haneda international airport in Tokyo

A protester pauses by a glass memorial on the spot where Charly Leundeu Keunang, 43, was shot by police on skid row, during a march to commemorate the more than 617 people they say have been killed by law enforcement in LA County since 2000, in Los Angeles, California

Lucy Nicholson/Reuters

Protester pauses by a glass memorial on the spot where Charly Leundeu Keunang, 43, was shot by police on skid row, during a march to commemorate the more than 617 people they say have been killed by law enforcement in LA County since 2000

A woman is reflected in a puddle as she walks alongside the bank of the river Main in Frankfurt, Germany

Christoph Schmidt/dpa/AP

A woman is reflected in a puddle as she walks alongside the bank of the river Main in Frankfurt, Germany

Japan Airlines Co. (JAL) group companies' new employees practice before releasing paper planes during an initiation ceremony at the company's hangar near Haneda Airport in Tokyo, Japan

Kiyoshi Ota/Bloomberg

Japan Airlines Co. (JAL) group companies’ new employees practice before releasing paper planes during an initiation ceremony at the company’s hangar near Haneda Airport in Tokyo, Japan

Indians climb the wall of a building to help students appearing in an examination in Hajipur, in the eastern Indian state of Bihar. Even with police presence, parents and relatives are reported to scale building walls in order to pass notes to help students cheat in their exams.

AP

Indians climb the wall of a building to help students appearing in an examination in Hajipur, in the eastern Indian state of Bihar. Even with police presence, parents and relatives are reported to scale building walls in order to pass notes to help students cheat in their exams. 

A woman poses for a wedding picture at the Bund in front of the financial district of Pudong in Shanghai on a sunny day on March

Johannes Eisele/AFP

A woman poses for a wedding picture at the Bund in front of the financial district of Pudong in Shanghai 

Photographers prepare for Chancellor of the Exchequer, George Osborne, to leave Downing Street this morning.

Charlie Bibby

Photographers prepare for Chancellor of the Exchequer, George Osborne, to leave Downing Street this morning.

A 'Blockupy' anti-capitalist protester walks near a burning barricade near the European Central Bank (ECB) building before the official opening of its new headquarters in Frankfur

Kai Pfaffenbach/Reuters

A ‘Blockupy’ anti-capitalist protester walks near a burning barricade near the European Central Bank (ECB) building before the official opening of its new headquarters in Frankfurt 

A eunuch dances during a rally to mark the congregation of thousands of eunuchs from different parts of India, in Jammu, India,

Channi Anand/AP

A eunuch dances during a rally to mark the congregation of thousands of eunuchs from different parts of India, in Jammu, India. The term eunuchs is used in India to describe transvestites, transsexuals and others who identify themselves as neither male nor female but as a member of a third gender. They traditionally survive by begging, dancing at weddings or blessing newborn babies and are frequently subjected to discrimination. 

 the United Launch Alliance Atlas V rocket with NASA's Magnetospheric Multiscale (MMS) spacecraft onboard launches from the Air Force Station Space Launch Complex 41 March 12, 2015 in Cape Canaveral, Florida. NASA's MMS mission will study how magnetic fields around Earth connect and disconnect, explosively releasing energy via a process known as magnetic reconnection. MMS consists of four identical spacecraft that work together to provide the first three-dimensional view of this fundamental process, which occurs throughout the universe.

Aubrey Gemignani/NASA via Getty Images

the United Launch Alliance Atlas V rocket with NASA’s Magnetospheric Multiscale (MMS) spacecraft onboard launches from the Air Force Station Space Launch Complex 41 in Cape Canaveral, Florida. NASA’s MMS mission will study how magnetic fields around Earth connect and disconnect, explosively releasing energy via a process known as magnetic reconnection. MMS consists of four identical spacecraft that work together to provide the first three-dimensional view of this fundamental process, which occurs throughout the universe.