On the other hand, if someone praised [Donald] Trump, he would respond with praise. This could result in creating a spiral in either a positive or negative direction. A negative spiral could potentially get out of hand, which would be alarming with regard to anyone with a hand hovering near the nuclear button.

During World War II, the Nazis put their victims into gas chambers and then incinerated them in ovens. While the Nazis took their victims to the incinerators, those who possess and threaten to use nuclear weapons plan to take these weapons - these portable incinerators - to the victims.

That the man in question should be Donald Trump, with all his personal flaws, challenges the United States and the world as never before in human history.

Peace is an ongoing process. It begins with the first step and it does not end. We, all of us alive today, are the gatekeepers of the future. The world we bequeath to our children and grandchildren will depend upon our success in building a more peaceful and decent world.

Perhaps the singular positive of [Donald] Trump's desire to improve the deteriorating relations between the U.S. and Russia will lead to achieving progress toward a world free of nuclear weapons.

Sooner or later there will be a nuclear 9/11 [by Islamic terrorists] in an American city or that of a US ally... A terrorist nuclear attack against an American city could take many forms. A worst case scenario would be the detonation of a nuclear device within a city. Depending upon the size and sophistication of the weapon, it could kill hundreds of thousands or even millions of people.

[Donald Trump] said on MSNBC's Morning Joe program, "My primary consultant is myself." While this may make consensus easy, the range of perspective is dangerously narrow.