The logo of the Venezuelan state oil company PDVSA is seen at a gas station in Caracas, Venezuela, September 14, 2016. REUTERS/Henry Romero

The logo of Microsoft is pictured in Issy-les-Moulineaux, France, August 8, 2016. REUTERS/Jacky Naegelen

The logo of Nu Skin is seen at its "experience centre", where customers can sample and purchase the company's products, in Beijing January 21, 2014. REUTERS/Kim Kyung-Hoon (CHINA - Tags: BUSINESS LOGO)

A Hanjin Shipping Co ship is seen stranded outside the Port of Long Beach, California, September 8, 2016. REUTERS/Lucy Nicholson/File Photo

A Hanjin Shipping Co ship is seen stranded outside the Port of Long Beach, California, September 8, 2016. REUTERS/Lucy Nicholson

U.S. Secretary of Energy Ernest Moniz in Washington, U.S., May 4, 2016. REUTERS/Joshua Roberts

A Hanjin Shipping Co ship is seen stranded outside the Port of Long Beach, California, September 8, 2016. REUTERS/Lucy Nicholson/File Photo

A U-2 reconnaissance plane belonging to the U.S. Air Force comes in for a landing at a U.S. air force base in Osan, south of Seoul April 3, 2013. REUTERS/Lee Jae-Won