In politics, it seems counterintuitive to engage in dialogue with violent groups, with radicals and terrorists, and with the states that support them. But Jonas Gahr Støre, the foreign minister of Norway, makes a compelling case for open discussion, even when values diverge, in an attempt to build greater security for all.img src="http://feeds.feedburner.com/~r/TEDTalks_video/~4/TFatj3a5ito" height="1" width="1"/