Canadian authorities said they still had no clear motive for a shooting rampage at Parliament. But a picture has emerged of the gunman as a troubled man who was frustrated by delays in his plans to go to Syria. Iraqis expressed relief that four former Blackwater security guards were convicted in a deadly Baghdad shooting. Hong Kong officials met with students for the first time since pro-democracy protests began. And the governor of the Mexican state where 43 students disappeared has resigned. A panel of journalists joins Diane for analysis of the week’s top international news stories.