Law enforcement officers search an address during an investigation into Ahmad Rahami, in Elizabeth, New Jersey, September 19, 2016. REUTERS/Eduardo Munoz

The Bank of England is seen through the columns on the Royal Exchange building in London, Britain August 4, 2016. REUTERS/Neil Hall

Archbishop Emeritus and Nobel Laureate Desmond Tutu in a file picture. REUTERS/Mark Wessels

Zimbabwe's President Robert Mugabe addresses the decision making body of his ruling ZANU PF party in Harare, Zimbabwe, September 9, 2016. REUTERS/Philimon Bulawayo

Customers shop at an Auchan hypermarket store in Simferopol, Crimea, July 4, 2016. REUTERS/Anton Zverev

People enter a Metro cash and carry store in Simferopol, Crimea, July 4, 2016. REUTERS/Anton Zverev

A camera is seen in front of the congress centre of the Swiss mountain resort of Davos January 24, 2011. REUTERS/Christian Hartmann

Aedes aegypti mosquitoes are seen at the Laboratory of Entomology and Ecology of the Dengue Branch of the U.S. Centers for Disease Control and Prevention in San Juan, Puerto Rico, March 6, 2016. REUTERS/Alvin Baez/File Photo