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

People look to the facade of Bellas Artes palace during the International Festival of Lights in downtown Mexico City. May 7, 2015.

Photo by Edgard Garrido

A house damaged by high waves is seen in Coyuca de Benitez, on the coast of Guerrero state, Mexico. May 4, 2015.Photo by Stringer Mexico

An orange flag used as an evidence marker is seen on the wreckage of a military helicopter at the crash site near Villa Purificación, Mexico. May 5, 2015.Photo by Stringer Mexico

An airport official looks at the wreckage of a Yemeni air force military transport aircraft after it was destroyed by an air strike, at the international airport of Yemen’s capital Sanaa, Yemen. May 5, 2015.Photo by Khaled Abdullah Ali Al Mahdi

The body of a Nepalese guide, recovered by the Israeli army’s National Rescue Unit from the Himalaya mountains, is pictured near Dhunche, Nepal. May 3, 2015.Photo by Olivia Harris

Migrants wait to disembark from the Italian navy ship Borsini in the Sicilian harbour of Palermo, May 5, 2015.Photo by Stringer Italy

Migrants rest after disembarking from tug boat Asso29 in the Sicilian harbour of Pozzallo, southern Italy. May 4, 2015.Photo by Antonio Parrinello

Manny Pacquiao of the Philippines (R) takes Floyd Mayweather, Jr. of the U.S. into the corner in the fourth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas, Nevada, USA. May 2, 2015.Photo by Steve Marcus

Football – FC Barcelona v Bayern Munich – UEFA Champions League Semi Final First Leg – The Nou Camp, Barcelona, Spain. May 6, 2015.Photo by Reuters Staff

Venezuela’s President Nicolas Maduro (L) and Cuba’s President Raul Castro attend a May Day parade in Havana, Cuba. May 1, 2015.Photo by Enrique de la Osa

A masked protester walks during clashes with police in Okmeydani neighbourhood in Istanbul, Turkey. May 1, 2015.Photo by Stringer Turkey

Russia’s Margarita Mamun performs in the individual final programme at the 31st European Rhythmic Gymnastics Championships in Minsk, Belarus. May 3, 2015.

Photo by Vasily Fedosenko

A six-year-old acrobat performs on the opening of a tourist festival in Bozhou, Anhui province, China. May 3, 2015.Photo by China Daily Information Corp – CDIC

Portraits by contemporary artist JR, collected during the month of March 2014, are displayed under the dome of the Pantheon in Paris, France. May 7, 2015.Photo by Benoit Tessier