Timothy L. O'Brien, Columnist

Uncle John Taught Trump About Fire and Fury

When the president reflects on nuclear weapons, he likes to remind listeners that he's the nephew of an MIT physicist.

"The single biggest threat."

Photographer: Three Lions/Getty Images

President Donald Trump returned this week to a recurring and favorite theme of his over the years: nuclear war and annihilation.

He has thought quite a bit about the topic. Really.