The wall between my father and me finally began to crack while I was three hundred yards from a jackknifed fuel tanker on a Colorado interstate, on a night when the snow came in sideways and the wind screamed loud enough to swallow a person’s voice whole.

I was shouting into a radio, requesting a medical evacuation helicopter that could not safely fly through that wind. Emergency lights pulsed through the whiteout, turning the snow around us red, then blue, then a strange ghostly white, over and over, like the world itself couldn’t decide what color the night should be.