The 'Nuclear Button' Explained: For Starters, There's No Button

The 'Nuclear Button' Explained: For Starters, There's No Button  New York Times North Korea reopens hotline to South to discuss Olympics  BBC News North Korea reopens key cross-border communications with South Korea  Politico South-North Korea Border Talks Might Follow Kim Jong Un's Recent Overture  ValueWalk ANALYSIS: Kim Jong Un pitting South Korea against US by re-establishing talks  ABC NewsFull coverage