WaPo’s David Ignatius: Why Mattis and Mullen toppled their bridge of silence. “The break was a decisive moment in the Trump presidency. But such inflection points are mysterious. Why does a bridge that has carried a million vehicles suddenly collapse when one more heavy load rumbles across? It’s not a linear process but a sudden discontinuity. Mathematicians call it ‘catastrophe theory.'” (Oh man, I miss the days when catastrophe was still just a theory.)