Democratic U.S. presidential candidate Bernie Sanders shakes hands with supporters at a campaign rally in Philadelphia, Pennsylvania April 6, 2016. Photo: Reuters
Ukraine's President Petro Poroshenko, accompanied by executive director of the museum and former astronaut Mamoru Mori (2nd R), claps his hands as he watches a performance of Japanese Honda Motor's humanoid robot Asimo as he visits Miraikan (National Museum of Emerging Science and Innovation) in Tokyo, Japan, April 7, 2016. Photo: Reuters
A Mapuche Indian activist is detained by riot policemen during a rally in Santiago, Chile, April 6, 2016. The demonstrators say they are demanding justice for indigenous Mapuche inmates as well as respect for their indigenous rights and land for their communities. Photo: Reuters
Italian police clash with demonstrators during a protest against Prime Minister Matteo Renzi during a visit to the southern city of Naples, Italy, April 6, 2016. Photo: Reuters
Migrants and refugees stage a protest at a makeshift camp at the Greek-Macedonian border near the village of Idomeni, Greece, April 6, 2016. Photo: Reuters
