TORONTO (Reuters) - Canada's main stock index was little changed on Friday as worries about the escalation of tensions in Ukraine were offset by gains in BlackBerry and Canadian Pacific Railway Ltd . The Toronto Stock Exchange's S&P/TSX composite index was down 1.18 points, 0.01 percent, at 15,203.30 shortly after the open. (Reporting by John Tilak; Editing by Chizu Nomiyama)



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