Iraqi security forces gather in Shirqat, Iraq, September 22, 2016. REUTERS/Stringer

Canada's Prime Minister Justin Trudeau (R) shakes hands with Chinese Premier Li Keqiang during a meeting on Parliament Hill in Ottawa, Ontario, Canada, September 22, 2016. REUTERS/Chris Wattie

Football Britain Soccer - Republic of Ireland v Oman - International Friendly - Aviva Stadium, Dublin, Republic of Ireland - 31/8/16 FAI Chief Executive John Delaney in the stands Reuters / Clodagh Kilcoyne Livepic EDITORIAL USE ONLY. - RTX2NQKA

The port side damage to the guided missile destroyer USS Cole is pictured after a bomb attack during a refueling operation in the port of Aden in this October 12, 2000 file photo. REUTERS/Aladin Abdel Naby/Files

Pope Francis speaks as he leads the weekly audience in Saint Peter's Square at the Vatican September 21, 2016. REUTERS/Remo Casilli

Ground Alberta beef is seen before packaging at Bon Ton Meat Market in Calgary, Alberta, October 3, 2012. REUTERS/Todd Korol

Henry Acosta, a mediator between the Marxist FARC rebels and the government, gestures during an interview with Reuters in Cali, Colombia September 17, 2016. Picture taken September 17, 2016. REUTERS/Jaime Saldarriaga

Henry Acosta, a mediator between the Marxist FARC rebels and the government, gestures during an interview with Reuters in Cali, Colombia September 17, 2016. Picture taken September 17, 2016. REUTERS/Jaime Saldarriaga