Iraqi Shia Muslim worshippers carry a mock coffin outside the Imam al-Kadhim shrine as they gather to mark the anniversary of the death of the eighth century revered Imam on Thursday in the Kadhimiya district of northern Baghdad

Ahmad Al-Rubaye/AFP

Iraqi Shia Muslim worshippers carry a mock coffin outside the Imam al-Kadhim shrine as they gather to mark the anniversary of the death of the eighth century revered Imam on Thursday in the Kadhimiya district of northern Baghdad

David Hockney presents his new body of work at the Annely Juda gallery, Mayfiar, London

Charlie Bibby/FT

David Hockney presents his new body of work at the Annely Juda gallery, Mayfair, London on Thursday

A Palestinian woman looks from a window of her house in the Al-Shati refugee camp in Gaza City on May 14, 2015 ahead of the commemorations for the 67th anniversary of the "Nakba". "Nakba" means in Arabic "catastrophe" in reference to the birth of the state of Israel 67-years-ago in British-mandate Palestine, which led to the displacement of hundreds of thousands of Palestinians who either fled or were driven out of their homes during the 1948 war over Israel's creation

Mohammed Abed/AFP

A Palestinian woman looks from a window of her house in the Al-Shati refugee camp in Gaza City on Thursday ahead of the commemorations for the 67th anniversary of the “Nakba”

Children and honour guards watch a performance during the so-called parade of children's troops in Rostov-on-Don, southern Russia, on Thursday

Eduard Korniyenko/Reuters

Children and honour guards watch a performance during the so-called parade of children’s troops in Rostov-on-Don, southern Russia, on Thursday

The evening sky in Schwangau, southern Germany, is illuminated by lightning during thunderstorms

Jonas Walzberg/dpa/AP

The evening sky in Schwangau, southern Germany, is illuminated by lightning during thunderstorms

A group of Maoris perform for Britain's Prince Harry during his visit to Putiki Marae in Whanganui on Wednesday

Marty Melville/AFP

A group of Maoris perform for Britain’s Prince Harry during his visit to Putiki Marae in Whanganui on Wednesday

 Investigators and first responders work near the wreckage of Amtrak Northeast Regional Train 188, from Washington to New York, that derailed yesterday May 13, 2015 in north Philadelphia, Pennsylvania. At least six people were killed and more than 200 others were injured in the crash

Win McNamee/Getty Images

Investigators and first responders work near the wreckage of Amtrak Northeast Regional Train 188, from Washington to New York, that derailed yesterday on Wednesday in north Philadelphia, Pennsylvania

A man walks past abandoned buildings with 'for sale' sign in central Athens, on Wednesday. Greece's economy contracted by 0.2 percent in the first quarter of this year, preliminary data from the national statistics agency ELSTAT showed, pushing the country back into recession

Louisa Gouliamaki/AFP

A man walks past abandoned buildings with ‘for sale’ sign in central Athens, on Wednesday

A man gestures as he celebrates in Bujumbura, Burundi.  Crowds poured onto the streets of Burundi's capital on Wednesday to celebrate after a general said he was dismissing President Pierre Nkurunziza for violating the constitution by seeking a third term in office

Goran Tomasevic/Reuters

A man gestures as he celebrates in Bujumbura, Burundi. Crowds poured onto the streets of Burundi’s capital on Wednesday to celebrate after a general said he was dismissing President Pierre Nkurunziza for violating the constitution by seeking a third term in office

Iraqi Shia Muslim worshippers mourn as they gather at the shrine of Imam Mussa al-Kadhim to mark the anniversary of the death of the eighth century revered Imam onWednesday in the northern district of Kadhimiya in the Iraqi capital Baghdad

Ahmad Al-Rubaye/AFP

Iraqi Shia Muslim worshippers mourn as they gather at the shrine of Imam Mussa al-Kadhim to mark the anniversary of the death of the eighth century revered Imam on Wednesday in the northern district of Kadhimiya in the Iraqi capital Baghdad

A miner sits at by a grave as relatives and friends gather at the cemetery in the Turkish town of Soma in the Manisa district, western Turkey, on Wednesday to mark the first anniversary of the Soma mine disaster in which 301 workers were killed after an explosion on May 13, 2014. The miners were killed after inhaling gas and toxic smoke from the fire which was caused when an abandoned pile of coal left next to an electrical transformer caught fire

Bulent Kilic/AFP

A miner sits at by a grave as relatives and friends gather at the cemetery in the Turkish town of Soma in the Manisa district, western Turkey, on Wednesday to mark the first anniversary of the Soma mine disaster in which 301 workers were killed after an explosion one year again

Director Emmanuelle Bercot poses during a photocall for the film "La tete haute" out of competition before the opening of the 68th Cannes Film Festival in Cannes...Director Emmanuelle Bercot poses during a photocall for the film "La tete haute" out of competition before the opening of the 68th Cannes Film Festival in Cannes, southern France, May 13, 2015. The 68th edition of the film festival will run from May 13 to May 24.

Eric Gaillard/Reuters

Director Emmanuelle Bercot poses during a photocall for the film “La tete haute” out of competition before the opening of the 68th Cannes Film Festival in Cannes, southern France on Wednesday

Pope Francis Pope Francis hugs a child as he arrives for his weekly general audience in St. Peter's Square at the Vatican, Wednesday, May 13, 2015

Alessandra Tarantino/AP

Pope Francis hugs a child as he arrives for his weekly general audience in St. Peter’s Square at the Vatican on Wednesday

A Nepalese resident carries a child as she walks past damaged homes in Bhaktapur on the outskirts of Kathmandu on May 13, 2015, following a new earthquake that hit May 12.  Rescuers were battling to reach survivors of a deadly new earthquake in Nepal that triggered landslides and brought down buildings, as the search continued for a US military helicopter that went missing while delivering aid. Thousands of traumatised survivors spent the night outdoors, afraid to return to their houses after the 7.3-magnitude quake hit, less than three weeks after the country was devastated by its deadliest quake in more than 80 years.

Prakash Mathema/AFP

A Nepalese resident carries a child as she walks past damaged homes in Bhaktapur on the outskirts of Kathmandu on Wednesday, following a new earthquake that hit the day before

The Viking Star going through the Thames Barrier in London as part of its maiden voyage. PRESS ASSOCIATION Photo. Picture date: Tuesday May 12, 2015. The delivery ceremony took place on March 28th when the ship was presented at Fincantieri s Marghera shipyard outside of Venice, Italy. On April 11th, Viking Star set sail from Istanbul making her way through the Mediterranean into the Atlantic on her way to be officially christened in Bergen, Norway on May 17th. Classified by Cruise Critic as a  small ship,  the all-veranda Viking Star has a gross tonnage of 47,800 tons, 465 cabins and will accommodate 930 passengers. It is engineered to allow direct access into most ports, so guests have an easy and efficient embark and debark. The Viking Star is one of three ocean cruise ships on order; the remaining two ships, Viking Sea and Viking Sky, are currently under construction

Viking Ocean Cruises/Jeff Moore/PA

The Viking Star going through the Thames Barrier in London as part of its maiden voyage on Tuesday

An aerial view taken from a sea plane shows Swiss pilot and original Jetman Yves Rossy and Vince Reffett flying over Dubai's Palm Island...An aerial view taken from a sea plane shows Swiss pilot and original Jetman Yves Rossy (front) and Vince Reffett flying over Dubai's Palm Island, Dubai, United Arab Emirates May 12, 2015

Lara Sukhtian/Reuters

Swiss pilot and original Jetman Yves Rossy and Vince Reffett flying over Dubai’s Palm Island, Dubai, United Arab Emirates on Tuesday

A policeman tries to protect a female police officer accused of shooting a protestor in the Buterere neighbourhood of Bujumbura, Burundi, May 12, 2015. Protestors opposed to the president's decision to run for a third term chased, beat and stoned the woman, who was later handed back to the police

Goran Tomasevic/Reuters

A policeman tries to protect a female police officer accused of shooting a protestor in the Buterere neighbourhood of Bujumbura, Burundi on tuesday. Protestors opposed to the president’s decision to run for a third term chased, beat and stoned the woman, who was later handed back to the police

The Queen's horses Alpine, Mingulay, George, Anson, Dawn and Emma with Grooms Harriet White, Zoe McDonald, Christopher Allen and Sadie Henderson on the private grounds of Windsor Castle ahead of the country's largest outdoor equestrian show, the Royal Windsor Horse Show

Steve Parsons/PA

The Queen’s horses Alpine, Mingulay, George, Anson, Dawn and Emma with Grooms Harriet White, Zoe McDonald, Christopher Allen and Sadie Henderson on the private grounds of Windsor Castle ahead of the country’s largest outdoor equestrian show, the Royal Windsor Horse Show

Women cover themselves as they walk on the banks of the river Ganges during a dust storm in Allahabad, India on Tuesday

Jitendra Prakash/Reuters

Women cover themselves as they walk on the banks of the river Ganges during a dust storm in Allahabad, India on Tuesday

An Rohingya woman, Samsidah Begom binti Abdul Syukur, cries as make a phone call to her son in Malaysia at a shelter on Tuesday in Lhoksukon, Aceh province, Indonesia. Boats carrying over 500 of Myanmar's Rohingya refugees have arrived in Indonesia, many requiring medical attention. They have warned that thousands more are thought to be still at sea. Myanmar's Rohingya Muslim community have long been persecuted and marginalized by Myanmar's mostly Buddhist population

Ulet Ifansasti/Getty Images

A Rohingya woman, Samsidah Begom binti Abdul Syukur, cries as make a phone call to her son in Malaysia at a shelter on Tuesday in Lhoksukon, Aceh province, Indonesia. Boats carrying over 500 of Myanmar’s Rohingya refugees have arrived in Indonesia, many requiring medical attention