Donald Trump's gun-slinger bravado has dominated world headlines this week, but the words of Canadian Foreign Affairs Minister Chrystia Freeland have been every bit as unambiguous. She has called Kim Jong-Un's nuclear program a "grave threat" and warned that it "can have no positive ending for North Korea." As for the United States, Trump or no Trump, when it is threatened, "we are there." PM Trudeau has issued no such warning nor any such pledge. But now that he has secured the release of pastor Hyeon Soo Lim, he must. Velvet-gloved diplomacy is the key to resolving the Korean nuclear crisis. But deterrence remains the iron fist.