(FILES) This file photo taken on August 10, 2016 in Lusaka shows Zambian Ruling party Patriotic Front presidential candidate and incumbent Zambian President Edward Lungu looking on during his presidential campaign closing rally. Zambia's newly re-elected President Edgar Lungu faces an uphill battle to revive an economy reeling from a slump in copper prices, with a free-falling currency and widening budget deficit. / AFP PHOTO / GIANLUIGI GUERCIAGIANLUIGI GUERCIA/AFP/Getty Images

(FILES) This file photo taken on August 10, 2016 in Lusaka shows Zambian Ruling party Patriotic Front presidential candidate and incumbent Zambian President Edward Lungu (C) dancing and gesturing before delivering a speech during his presidential campaign closing rally. Zambia's newly re-elected President Edgar Lungu faces an uphill battle to revive an economy reeling from a slump in copper prices, with a free-falling currency and widening budget deficit. / AFP PHOTO / GIANLUIGI GUERCIAGIANLUIGI GUERCIA/AFP/Getty Images

LOS ANGELES, CA - AUGUST 20: (L-R) Influencer Charisma Star, CEO of NYX Cosmetics Scott Friedman, finalist Laura Sanchez, host Kandee Johnson and Senior Vice President Marketing & Global Business Development, NYX Cosmetics Nathalie Kristo attend the 5th Annual NYX FACE Awards on August 20, 2016 in Los Angeles, California. (Photo by Vivien Killilea/Getty Images for NYX Professional Makeup)

LOS ANGELES, CA - AUGUST 20: (L-R) CEO of NYX Cosmetics Scott Friedman, Senior Vice President Marketing & Global Business Development - ?NYX Cosmetics Nathalie Kristo, finalists Laura Sanchez, Alexa Poletti, Brianna Fox, influencer Charisma Star, host Kandee Johnson and finalists PompBerry, Haley Wight aka CosmoByHaley and RawBeautyKristi attend the 5th Annual NYX FACE Awards on August 20, 2016 in Los Angeles, California. (Photo by Vivien Killilea/Getty Images for NYX Professional Makeup)

The head of Scope Ratings Torsten Hinrichs poses before an AFP interview in Berlin on August 12, 2016. The latest European challenge to the all-powerful US credit ratings agencies doesn't come from the continent's financial capital Frankfurt -- but Berlin, better known for politics than banking. / AFP PHOTO / TOBIAS SCHWARZ / TO GO WITH AFP STORY by PAULINE HOUEDETOBIAS SCHWARZ/AFP/Getty Images

The head of Scope Ratings Torsten Hinrichs poses before an AFP interview in Berlin on August 12, 2016. The latest European challenge to the all-powerful US credit ratings agencies doesn't come from the continent's financial capital Frankfurt -- but Berlin, better known for politics than banking. / AFP PHOTO / TOBIAS SCHWARZTOBIAS SCHWARZ/AFP/Getty Images

TO GO WITH AFP STORY BY ERWAN LUCAS (FILES) This file photo taken on August 14, 2016 shows people walking past Pikachu, the popular animation Pokemon series character, in the small town of Occoquan, Virginia. Pokemon Go has sent millions of people onto the streets in a worldwide hunt for virtual monsters -- and from neighbourhood restaurants to multi-national corporations, businesses smell a profit. Beyond products, companies see huge potential in the app's ability to attract crowds to places in a way that typical advertising does not, by tempting them with the prospect of adding new Pokemon to their collections. Bars and restaurants from New York to Sydney are reportedly paying for "lures", a feature of the game which draws Pokemon to a location, hoping this will draw in customers to linger and spend money. / AFP PHOTO / PAUL J. RICHARDSPAUL J. RICHARDS/AFP/Getty Images

TO GO WITH AFP STORY BY ERWAN LUCAS (FILES) This file photo taken on July 13, 2016 shows a customer visits a shop selling Pokemon goods and cuddly toys in Tokyo. Pokemon Go has sent millions of people onto the streets in a worldwide hunt for virtual monsters -- and from neighbourhood restaurants to multi-national corporations, businesses smell a profit. Beyond products, companies see huge potential in the app's ability to attract crowds to places in a way that typical advertising does not, by tempting them with the prospect of adding new Pokemon to their collections. Bars and restaurants from New York to Sydney are reportedly paying for "lures", a feature of the game which draws Pokemon to a location, hoping this will draw in customers to linger and spend money. / AFP PHOTO / KAZUHIRO NOGIKAZUHIRO NOGI/AFP/Getty Images