An opposition supporter takes part in a rally to demand a referendum to remove Venezuela's President Nicolas Maduro, in Caracas, Venezuela, September 16, 2016. REUTERS/Henry Romero

Lilian Tintori (C), wife of jailed Venezuelan opposition leader Leopoldo Lopez takes part in a rally to demand a referendum to remove Venezuela's President Nicolas Maduro, in Caracas, Venezuela, September 16, 2016. REUTERS/Henry Romero

Supporters of Venezuela's opposition face police officers who are blocking a street, as they take part in a rally to demand a referendum to remove Venezuela's President Nicolas Maduro, in Caracas, Venezuela, September 16, 2016. REUTERS/Henry Romero

Supporters of Venezuela's opposition (R) face riot police officers who are blocking a street, as they take part in a rally to demand a referendum to remove Venezuela's President Nicolas Maduro, in Caracas, Venezuela, September 16, 2016. REUTERS/Stringer FOR EDITORIAL USE ONLY. NO RESALES. NO ARCHIVES.

Supporters of Venezuela's opposition face police officers who are blocking a street, as they take part in a rally to demand a referendum to remove Venezuela's President Nicolas Maduro, in Caracas, Venezuela, September 16, 2016. REUTERS/Henry Romero

Britain Formula One - F1 - British Grand Prix 2016 - Silverstone, England - 10/7/16 Red Bull Team Principal Christian Horner before the race REUTERS/Matthew Childs Livepic

Nigel Farage (L), the outgoing leader of the United Kingdom Independence Party (UKIP), congratulates new leader Diane James, at the party's annual conference in Bournemouth, Britain, September 16, 2016. REUTERS/Toby Melville

Diane James, the new leader of the United Kingdom Independence Party (UKIP), speaks at the party's annual conference in Bournemouth, Britain, September 16, 2016. REUTERS/Toby Melville