Republican vice presidential nominee Mike Pence holds a joint news conference with U.S. House Speaker Paul Ryan (R-WI) (not pictured) following a House Republican party conference meeting in Washington, U.S. September 13, 2016. REUTERS/Jonathan Ernst

Formula One - Singapore Grand Prix - Marina Bay, Singapore - 17/9/16 Mercedes' driver Nico Rosberg of Germany celebrates pole position after qualifying session. REUTERS/Edgar Su

Formula One - Singapore Grand Prix - Marina Bay, Singapore - 17/9/16 Mercedes' driver Nico Rosberg of Germany before qualifying. REUTERS/Jeremy Lee

French police secure the area next to the Saint-Leu church during a security operation on Saturday in a shopping district of Paris, France, September 17, 2016. REUTERS/Philippe Wojazer

French police secure the area next to the Saint-Leu church during a security operation on Saturday in a shopping district of Paris, France, September 17, 2016. REUTERS/Philippe Wojazer

French police secure the area next to the Saint Leu church during a security operation on Saturday in a shopping district of Paris, France, September 17, 2016. REUTERS/Philippe Wojazer

Fighters from FARC stand in line during opening of ceremony congress at the camp where they prepare for ratifying a peace deal with the government, near El Diamante in Yari Plains, Colombia, September 17, 2016. REUTERS /John Vizcaino

FARC rebel leader Rodrigo Londono, better known by hs nom de guerre Timochenko talks during the opening of ceremony congress at the camp where they prepare for ratifying a peace deal with the government, near El Diamante in Yari Plains, Colombia, September 17, 2016. REUTERS /John Vizcaino