People walk in front of a store on a commercial street in downtown Sao Paulo December 4, 2014. REUTERS/Paulo Whitaker

Brazil's Finance Minister Henrique Meirelles talks to the audience during a meeting with businessmen about "The recovery of the Brazilian economy" in Sao Paulo, Brazil, September 19, 2016. REUTERS/Nacho Doce

Former British Prime Minister Tony Blair speaks as Reuters Editor-at-Large Sir Harold Evans (not pictured) moderates a Reuters Newsmaker conversation "Politics on the Edge," in Manhattan, New York, U.S., September 20, 2016. REUTERS/Bria Webb

Former British Prime Minister Tony Blair speaks as Reuters Editor-at-Large Sir Harold Evans (not pictured) moderates a Reuters Newsmaker conversation "Politics on the Edge," in Manhattan, New York, U.S., September 20, 2016. REUTERS/Bria Webb

Former British Prime Minister Tony Blair speaks as Reuters Editor-at-Large Sir Harold Evans (not pictured) moderates a Reuters Newsmaker conversation "Politics on the Edge," in Manhattan, New York, U.S., September 20, 2016. REUTERS/Bria Webb

Former British Prime Minister Tony Blair smiles as Reuters Editor-at-Large Sir Harold Evans (not pictured) moderates a Reuters Newsmaker conversation "Politics on the Edge," in Manhattan, New York, U.S., September 20, 2016. REUTERS/Bria Webb

A copy of papers filed at Los Angeles Superior Court by Angelina Jolie shows her petition for divorce from her husband Brad Pitt in Los Angeles, California, U.S. September 20, 2016. Jolie filed in Los Angeles Superior Court on Monday, citing irreconcilable differences as grounds for the split, court documents showed. REUTERS/Piya Sinha Roy

Former British Prime Minister Tony Blair speaks as Reuters Editor-at-Large Sir Harold Evans (not pictured) moderates a Reuters Newsmaker conversation "Politics on the Edge," in Manhattan, New York, U.S., September 20, 2016. REUTERS/Bria Webb