Top leader of the Democratic People's Republic of Korea (DPRK) Kim Jong-un (L) shakes hands with US President Donald Trump in Singapore before the first-ever DPRK-US summit, on June 12, 2018. (Photo: Xinhua)

Iury Gazinsky of Russia during the 2018 FIFA World Cup Russia Group A match between Russia and Saudi Arabia at Luzhniki Stadium on June 14, 2018 in Moscow, Russia. (Photo: VCG)

French railway workers are reflected in a puddle as they demonstrate with banners, flags and flares in Lyon, east-central France, on June 12, 2018, on the 15th day of rolling train strikes since April against the planned overhaul of French national railway operator SNCF. (Photo: VCG)

A street vendor offers masks of Mexican presidential candidates (L-R) Jose Antonio Meade (PRI, PVEM and Nueva Alianza parties), Ricardo Anaya (PAN-PRD-Movimiento Ciudadano parties) and Andres Manuel Lopez Obrador (Morena, PT and PES parties) for sale in a street in Mexico City, on June 13, 2018, ahead of July 1st national election. (Photo: HO/PEDRO PARDO)

An aerial photo taken on June 13, 2018 shows thousands of people eating crayfish around tables in Huaian city, China. (Photo: VCG)

People are taken to amazing waterfalls in Costa Rica where they can jump from the tops. These stunning photographs show intrepid tourists flinging themselves from cliffs as high as 100ft and then plunging into the pools below. (Photo: VCG)

An aerial photo of colorful salt lakes in Yuncheng city,China on June 12, 2018. (Photo: VCG)

After eight months of construction, the world's longest circular glass bridge locating on the Fuxi Mountain finishes in Zhengzhou city, China on June 12, 2018. (Photo: VCG)

A Color Runner is running with his arms holding his son in Beijing on Father's Day, June 17, 2018. (Photo: VCG)

Chinese traditional Dragon Boat Festival is coming and people race to celebrate it in Chongqing municipality, China on June 16, 2018. (Photo: VCG)