Men drive a motorcycle near a damaged aid truck after an airstrike on the rebel held Urm al-Kubra town, western Aleppo city, Syria September 20, 2016. REUTERS/Ammar Abdullah

A damaged UNHCR truck is pictured after an airstrike on the rebel held Urm al-Kubra town, western Aleppo city, Syria September 20, 2016. REUTERS/Ammar Abdullah

Damaged Red Cross and Red Crescent medical supplies lie inside a warehouse after an airstrike on the rebel held Urm al-Kubra town, western Aleppo city, Syria September 20, 2016. REUTERS/Ammar Abdullah

A boy inspects a damaged aid truck after an airstrike on the rebel held Urm al-Kubra town, western Aleppo city, Syria September 20, 2016. REUTERS/Ammar Abdullah

German Chancellor and chairwoman of the Christian Democratic Union (CDU) Angela Merkel addresses a news conference in Berlin, Germany September 19, 2016. REUTERS/Fabrizio Bensch

A Marriott flag hangs at the entrance of the New York Marriott Downtown hotel in Manhattan, New York November 16, 2015. REUTERS/Andrew Kelly

Traders stand by the post where the stock for Starwood Hotels & Resorts Worldwide Inc is traded on the floor of the New York Stock Exchange November 16, 2015. REUTERS/Brendan McDermid

The Bank of England is seen in the City of London in London, Britain August 4, 2016. REUTERS/Neil Hall/File Photo