In this time of asymmetrical warfare, terrorism, and the war images that have been projected into our living rooms since Vietnam, it's easy for those not alive fifty years ago to forget, or even not even consider, the fear, the horror and the specter of nuclear annihilation.

The President's recent trip to Hiroshima and the fear of Trump having nuclear codes are both reminders that the nuclear reality still lives among us.

That reality is what motivated three unlikely activists in the summer of 2012 to break into one of our nation's seemingly most secure nuclear facilities.  In so doing they triggered  political, legal and moral issues that had lied dormant for so long.

Telling this powerful story and what it says about the nuclear age is my guest Washington post reporter Dan Zak in Almighty: Courage, Resistance, and Existential Peril in the Nuclear Age.

My conversation with Dan Zak: