9.2K views · 50 reactions | “The question is, would you really escalate from a cyber war to a nuclear war?” A new US review of nuclear weapon policy lays out scenarios under which the president might use a nuclear weapon in response to a non-nuclear attack. National security reporter and analyst David Sanger explains. | Christiane Amanpour | Facebook

344K views · 4.4K reactions | U.S. Senator Graham says that if Russia dares use a nuclear weapon on Ukraine: "You can expect a massive response from NATO. And you will be at war with NATO." | Euromaidan, War in Ukraine | Facebook

A nuclear weapon program, a war of words with President Trump and a secretive regime: Go inside the North Korean threat in our doc, “North Korea’s Deadly Dictator.” http://to.pbs.org/2jPlJhn | FRONTLINE | PBS