A man uses a mobile phone in front of an advertisement board bearing the image of Pokemon Go at an electronic shop in Tokyo, Japan, July 27, 2016. REUTERS/Kim Kyung-Hoon/File Photo

International Atomic Energy Agency (IAEA) Director General Yukiya Amano smiles as he waits for a board of governors meeting to begin at the IAEA headquarters in Vienna, Austria June 6, 2016. REUTERS/Heinz-Peter Bader

Geeta, wife of Ravi Paul, an Indian army soldier who was killed in Sunday's attack at an Indian army base in Kashmir's Uri, mourns at her house in Sarwa village in Samba district, south of Jammu, September 19, 2016. REUTERS/Mukesh Gupta

Geeta (in yellow), wife of Ravi Paul, an Indian army soldier who was killed in Sunday's attack at an Indian army base in Kashmir's Uri, mourns at her house in Sarwa village in Samba district, south of Jammu, September 19, 2016. REUTERS/Mukesh Gupta

2016 Rio Olympics - Golf - Final - Men's Individual Stroke Play - Olympic Golf Course - Rio de Janeiro, Brazil - 14/08/2016. Justin Rose (GBR) of Britain celebrates his gold medal win in the men's Olympic golf compeititon. REUTERS/Andrew Boyers

European Commission President Jean-Claude Juncker addresses the European Parliament during a debate on The State of the European Union in Strasbourg, France, September 14, 2016. REUTERS/Vincent Kessler/File Photo

Roofers work on new homes at a residential construction site in the west side of the Las Vegas Valley in Las Vegas, Nevada April 5, 2013. REUTERS/Steve Marcus

2016 Rio Olympics - Athletics - Final - Men's 5000m Final - Olympic Stadium - Rio de Janeiro, Brazil - 20/08/2016. Mo Farah (GBR) of Britain celebrates winning the race. REUTERS/Dylan Martinez