Sea waves hit the rocks as Kudankulam nuclear power project plant is seen in the background in the southern Indian state of Tamil Nadu, September 13, 2012. REUTERS/Adnan Abidi/File photo

A fisherman stands on his boat on a beach near Kudankulam nuclear power project in the southern Indian state of Tamil Nadu, India, September 13, 2012. REUTERS/Adnan Abidi/File Photo

Greek Prime Minister Alexis Tsipras poses for a portrait on the sidelines of the United Nations General Assembly in Manhattan, New York, U.S. September 21, 2016. REUTERS/Andrew Kelly

Greek Prime Minister Alexis Tsipras poses for a portrait on the sidelines of the United Nations General Assembly in Manhattan, New York, U.S. September 21, 2016. REUTERS/Andrew Kelly

Greek Prime Minister Alexis Tsipras looks out from a hotel window on the sidelines of the United Nations General Assembly in Manhattan, New York, U.S. September 21, 2016. REUTERS/Andrew Kelly

Greek Prime Minister Alexis Tsipras poses for a portrait on the sidelines of the United Nations General Assembly in Manhattan, New York, U.S. September 21, 2016. REUTERS/Andrew Kelly

Mexico's Economy Secretary Ildefonso Guajardo Villarreal speaks during a news conference after signing an agreement in Rio de Janeiro, March 9, 2015. REUTERS/Pilar Olivares

The dashboard for the New York Police Department's 'Domain Awareness System' (DAS) is seen in New York May 29, 2013. REUTERS/Shannon Stapleton/File Photo