United States Secretary of State John Kerry (L) talks with the Sultan of Sokoto and President-General of the Nigerian National Supreme Council for Islamic Affairs (NSCIA) Muhammadu Sa'ad Abubakar during his visit to his palace in Sokoto, on August 23, 2016. Kerry, who is on a three-nation tour is in Nigeria to discuss counterterrorism efforts, the Nigerian economy, the fight against corruption, and human rights issues. / AFP PHOTO / PIUS UTOMI EKPEIPIUS UTOMI EKPEI/AFP/Getty Images

General view of the skyline of La Defense business district with its Arche behind Paris' landmark, the Arc de Triomphe and the Champs Elysees Avenue in Paris, France, January 13, 2016. REUTERS/Charles Platiau/File Photo

MIAMI, FL - AUGUST 22: Florida Governor Rick Scott speaks with business owner, Tom Curitore, before a round table discussion about Zika preparedness in the Wynwood neighborhood where the mosquito born Zika virus has been found, August 22, 2016 in Miami, Florida. Miami's Wynwood neighborhood along with Miami Beach have been found to have cases of people with the mosquito born Zika virus as South Florida continues to work on controlling the outbreak. (Photo by Joe Raedle/Getty Images)

MIAMI, FL - AUGUST 22: Florida Governor Rick Scott speaks with business owners after a round table discussion about Zika preparedness in the Wynwood neighborhood where the mosquito born Zika virus has been found, August 22, 2016 in Miami, Florida. Miami's Wynwood neighborhood along with Miami Beach have been found to have cases of people with the mosquito born Zika virus as South Florida continues to work on controlling the outbreak. (Photo by Joe Raedle/Getty Images)

NEW YORK, NY - AUGUST 17: A vendor sells September 11 merchandise near One World Trade Center or the "Freedom Tower" in lower Manhattan on August 17, 2016 in New York City. As the nation prepares to commemorate the 15 year anniversary of the September 11 terrorist attcks in lower Manhattan, New York City finds itself a city forever changed by the events of that day. The presence of security on the street is a daily reality for the millions of residents and tourists who filter through the city. Lower Manhattan, previously a gritty neighborhood dominated by the financial industry, has become one of Manhattan's top tourist destinations with memorials to the victims, shopping malls and historical landmarks. Over 3,000 people were killed during the attacks in New York City and Washington, D.C. (Photo by Spencer Platt/Getty Images)

NEW YORK, NY - AUGUST 17: A woman prays at Trinity Church in lower Manhattan near One World Trade Center or the "Freedom Tower" on August 17, 2016 in New York City. The church became deeply involved in helping New Yorkers cope with the events of September 11, 2001. As the nation prepares to commemorate the 15 year anniversary of the September 11 terrorist attcks in lower Manhattan, New York City finds itself a city forever changed by the events of that day. The presence of security on the street is a daily reality for the millions of residents and tourists who filter through the city. Lower Manhattan, previously a gritty neighborhood dominated by the financial industry, has become one of Manhattan's top tourist destinations with memorials to the victims, shopping malls and historical landmarks. Over 3,000 people were killed during the attacks in New York City and Washington, D.C. (Photo by Spencer Platt/Getty Images)

Philippe Jehan, President of the French Departmental Federation of Farmers Unions (FDSEA), installs a banner reading "Our business has a price", on August 22, 2016 in front the Lactalis headquarters Group, in Change, near Laval, northwestern France. Farmers of western France decided to demonstrate on the evening of August 22 in Change near Laval in front of Lactalis headquarters, the first world producers of milk products but considered as the worst payer to milk industry farmers. French Minister of Agriculture Stephane le Foll asked on August 22 to restart talks between Lactalis and milk producers. / AFP PHOTO / JEAN-FRANCOIS MONIERJEAN-FRANCOIS MONIER/AFP/Getty Images

A French farmer installs a banner reading "Our business has a price", on August 22, 2016 in front the Lactalis headquarters Group, in Change, near Laval, northwestern France. Farmers of western France decided to demonstrate on the evening of August 22 in Change near Laval in front of Lactalis headquarters, the first world producers of milk products but considered as the worst payer to milk industry farmers. French Minister of Agriculture Stephane le Foll asked on August 22 to restart talks between Lactalis and milk producers. / AFP PHOTO / JEAN-FRANCOIS MONIERJEAN-FRANCOIS MONIER/AFP/Getty Images