Canadian Prime Minister Justin Trudeau, right, shakes hands with Defence Minister Harjit Singh Sajjan upon arriving at the NATO summit in Warsaw, Poland, Friday, July 8, 2016. Trudeau is expressing sympathy over the sniper deaths of five police officers in Dallas. THE CANADIAN PRESS/AP, Markus Schreiber
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Canadian Prime Minister Justin Trudeau, right, shakes hands with Defence Minister Harjit Singh Sajjan upon arriving at the NATO summit in Warsaw, Poland, Friday, July 8, 2016. Trudeau is expressing sympathy over the sniper deaths of five police officers in Dallas. THE CANADIAN PRESS/AP, Markus Schreiber (Markus Schreiber/Associated Press)
