BBC Lookahead: United Nations Security General's Climate Tour, Swiss Gun Control Referendum Tuesday, May 14, 2019 | Sacramento, CA Listen / Update RequiredTo play audio, update browser or Flash plugin. Every Monday, CapRadio's Steve Milne gets a preview of the biggest global stories of the week from BBC reporters. This week, he's joined by Rich Preston in London to discuss the United Nations Secretary General's climate change tour of the South Pacific and Switzerland's gun control referendum.