WEF

An attendee films Xi Jinping, China's president, on a mobile device as he speaks during the opening plenary session of the World Economic Forum (WEF) annual meeting in Davos, Switzerland, on Tuesday, Jan. 17, 2017. World leaders, influential executives, bankers and policy makers attend the 47th annual meeting of the World Economic Forum (WEF) in Davos from Jan. 17-20. Photographer: Simon Dawson/Bloomberg

Simon Dawson/Bloomberg

An attendee films Xi Jinping, China’s president, on a mobile device as he speaks during the opening plenary session of the World Economic Forum annual meeting in Davos, Switzerland. Photo Simon Dawson/Bloomberg

WORLD ECONOMIC FORUM, WEF, DAVOS, WIRTSCHAFTSTREFFEN, 45. WELTWIRTSCHAFTSTREFFEN, WELTWIRTSCHAFTSFORUM, FORUM DAVOS,...epa04578104 A message announcing the cancellation of the appearance of King Abdullah of Jordan is displayed  following the death of Saudi King Abdullah bin Abd al-Aziz, during a panel session at the 45th Annual Meeting of the World Economic Forum, WEF, in Davos, Switzerland,   January 23, 2015.  EPA/JEAN-CHRISTOPHE BOTT

Jean-Christophe Bott/EPA

A message announcing the cancellation of the appearance of King Abdullah of Jordan is displayed following the death of Saudi King Abdullah bin Abd al-Aziz, during a panel session at the 45th Annual Meeting of the World Economic Forum, WEF, in Davos, Switzerland 

A member of Swiss special police forces stands on the roof of the Kongress Hotel next to the Congress Center in Davos, Switzerland, Tuesday, Jan. 21, 2014. The world's financial and political elite will head this week to the Swiss Alps for 2014  gathering of the World Economic Forum at the Swiss ski resort of Davos.

Michel Euler/AP

A member of the Swiss special police force stands on the roof of the Kongress Hotel next to the Congress Centre in Davos, Switzerland. The world’s financial and political elite will head this week to the Swiss Alps for the 2014 gathering of the World Economic Forum at the ski resort