43K views · 258 reactions | THE MYSTERIOUS DICTATOR: Kim Jong Un, the 36-year-old “Supreme Leader” of North Korea, has a ruthless history that includes executing his own family members and a series of nuclear weapons tests that has kept the entire world on edge. David Muir reports from Singapore. https://abcn.ws/2HCFiQD | ABC World News Tonight with David Muir | Facebook

18K views · 129 reactions | Learn how Nevada became America’s primary nuclear weapons test location at the National Atomic Testing Museum. From the Cold War to the Global War on Terror, the museum highlights the history of atomic testing and its relevance to national security and international stability . | Spirit of Nevada | Facebook