It was still daytime, and classes had been canceled at Michigan State University, as they had been on Feb. 13 for three years now.
Marco Diaz Muñoz, a humanities assistant professor at MSU, was about to finish his little walk around Berkey Hall. It was sunny, a little below freezing. A high window facing the art museum reminded him that, three years ago to the day, more than 30 of his students leaped out into the cold night through a not-so-large window opening to save themselves from the shooter.
“I don’t know if there was concrete or grass outside that window,” he said. “But if it was concrete, some of them must have injured themselves severely. How much is that—nine feet high? I mean, the desperation to save your life makes you do anything, doesn’t it?”…