Canada Prime Minister Justin Trudeau walks to the National Press building in Ottawa, Thursday, Jan. 9, 2020. U.S. and Canadian officials say it is ??shighly likely??? that an Iranian anti-aircraft missile downed a Ukrainian jetliner late Tuesday, killing all 176 people on board. Trudeau, whose country lost at least 63 citizens in the crash, said evidence indicates the plane was struck by a surface-to-air missile. (Adrian Wyld/The Canadian Press via AP)

Canada Prime Minister Justin Trudeau arrives for a news conference at the National Press building in Ottawa, Thursday, Jan. 9, 2020. U.S. and Canadian officials say it is ??shighly likely??? that an Iranian anti-aircraft missile downed a Ukrainian jetliner late Tuesday, killing all 176 people on board. Trudeau, whose country lost at least 63 citizens in the crash, said evidence indicates the plane was struck by a surface-to-air missile. (Sean Kilpatrick/The Canadian Press via AP)

Canada Prime Minister Justin Trudeau arrives for a news conference at the National Press building in Ottawa, Thursday, Jan. 9, 2020. U.S. and Canadian officials say it is ??shighly likely??? that an Iranian anti-aircraft missile downed a Ukrainian jetliner late Tuesday, killing all 176 people on board. Trudeau, whose country lost at least 63 citizens in the crash, said evidence indicates the plane was struck by a surface-to-air missile. (Sean Kilpatrick/The Canadian Press via AP)

Canada Prime Minister Justin Trudeau arrives for a news conference at the National Press building in Ottawa, Thursday Jan. 9, 2020. U.S. and Canadian officials say it is ??shighly likely??? that an Iranian anti-aircraft missile downed a Ukrainian jetliner late Tuesday, killing all 176 people on board. Trudeau, whose country lost at least 63 citizens in the crash, said evidence indicates the plane was struck by a surface-to-air missile. (Sean Kilpatrick/The Canadian Press via AP)