A employee works at a yarn weaving plant in Ha Nam province, outside Hanoi, Vietnam October 7, 2015. REUTERS/Kham

Emergency services and rail workers attend the scene of a train derailment on the Euston to Milton Keynes line, at Hunton Bridge tunnel, north of Watford Junction station, Britain September 16, 2016. REUTERS/Eddie Keogh

Emergency services and rail workers attend the scene of a train derailment on the Euston to Milton Keynes line, at Hunton Bridge tunnel, north of Watford Junction station, Britain September 16, 2016. REUTERS/Eddie Keogh

Emergency services attend the scene of a train derailment on the Euston to Milton Keynes line, at Hunton Bridge tunnel, north of Watford Junction station, Britain September 16, 2016. REUTERS/Eddie Keogh

The logo of a Volkswagen Beetle car is seen at the "Sunshinetour 2016" in Travemuende at the Baltic Sea, August 20, 2016. REUTERS/Fabian Bimmer/File Photo

Rail workers attend the scene of a train derailment on the Euston to Milton Keynes line, at Hunton Bridge tunnel, north of Watford Junction station, Britain September 16, 2016. REUTERS/Eddie Keogh

A man walks past the Ecuadorian Embassy where WikiLeaks founder Julian Assange is taking refuge, in London, Britain September 16, 2016. REUTERS/Peter Nicholls

Russian central bank governor Elvira Nabiullina attends a news conference, dedicated to the issuance of a new 200-rouble banknote, in Moscow, Russia, June 28, 2016. REUTERS/Sergei Karpukhin