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

German Chancellor Angela Merkel (R) welcomes Italian President Carlo Azeglio Ciampi before a meeting in Berlin March 29, 2006. REUTERS/Arnd Wiegmann/File Photo

Italy's new President Giorgio Napolitano shakes hands with the country's outgoing president Carlo Azeglio Ciampi (R) during a ceremony marking the transfer of power, at Quirinale palace in Rome May 15, 2006. REUTERS/Chris Helgren/File Photo

Italy's Prime Minister Silvio Berlusconi (L) meets President Carlo Azeglio Ciampi (R) to hand in his government's resignation at the Quirinale palace in Rome May 2, 2006. Italian Presidency/Enrico Oliverio/Handout via REUTERS/File Photo

Pope Benedict XVI (L) arrives with Italian President Carlo Azeglio Ciampi (R) at an auditorium before a concert in Rome April 21, 2006. REUTERS/Enrico Oliverio/Pool/File Photo

A national flag flies behind a security camera outside the Ecuadorian Embassy where WikiLeaks founder Julian Assange is taking refuge, in London, Britain September 16, 2016. REUTERS/Peter Nicholls