Defense industrial base officials from the United States, the United Kingdom, Australia and Canada met in Washington today to discuss transnational security cooperation, but were leery of weighing in on potential disruptions caused by President Trump's new tariffs on steel and aluminum. “I'll pass on this one,” Ghislain Chaput, first secretary of defense trade policy at the Embassy of Canada, said during a panel discussion at the Center for Strategic and International Studies. Though Canada and Mexico are to be...