A pet runs during a mini-marathon for dogs in Bangkok, Thailand May 7, 2017.

A man carries his dog as he prays during Vesak Day, an annual celebration of Buddha's birth, enlightenment and death, at Wat Yai Chai Mongkhon temple in Ayutthaya, Thailand, May 10, 2017. REUTERS/Athit Perawongmetha - RTS160HE

Members of the "Los Diablos de Luzon" folk group are seen before the parade of the 12th International Festival of the Iberian Mask in Lisbon, Portugal May 6, 2017.

The Pink Floyd inflatable pig floats next to Broadcasting House to promote their new exhibition at the V&A museum, in London, Britain May 10, 2017. REUTERS/Neil Hall TPX IMAGES OF THE DAY - RTS161CH

A woman arrange books at her open air book store in Skopje, Macedonia May 9, 2017. REUTERS/Ognen Teofilovski - RTS15WVK

Participants in The Tweed Run cycle ride across Westminster Bridge in London, Britain, May 6, 2017.

Canadian Corporal Kody Njolstad tries to get a squirrel to grab onto a tree after he helped rescue it from a flooded residential area in Gatineau, Quebec, Canada May 9, 2017. REUTERS/Chris Wattie - RTS15W26

An exit of an operational subway station is seen in a sparsely populated area in Chongqing, China, May 8, 2017.

Paramilitary policemen take part in a training in Baishan, Jilin province, China May 6, 2017.

Nurses practice smiling with chopsticks in their mouths at a hospital in Handan, Hebei province, China, May 8, 2017. REUTERS/Stringer

Italy's Francesco Gabbani performs with the song "Occidentali's Karma" during the Eurovision Song Contest 2017 Semi-Final 1 Dress rehearsal 1 at the International Exhibition Centre in Kiev, Ukraine, May 8, 2017.

Alibaba employees attend a mass wedding at their headquarters in Hangzhou, Zhejiang province, May 10, 2017.

A participant performs with a sabre during the traditional Cossack games outside the village of Starocherkasskaya, in Rostov region, Russia, May 6, 2017.