Upstairs, Martha had thrown open the nursery door. The heat was unbearable, the smoke so thick she could barely see the crib. But she heard Benjamin’s screams, that high-pitched wail of terror only a baby can make. She dropped to her knees, crawling across the floor where the air was slightly clearer, and reached the crib. Benjamin stood clutching the bars, his tiny face tomato-red from crying, his pajamas soaked with sweat.