Oklahoma City, Oklahoma CNN  —  PJ Allen’s tiny body was horrifically burned when rescuers found him. Later in the hospital, the toddler was so covered in bandages, his grandmother had only his belly button to recognize him. He bears the scars of the deadliest homegrown terrorist attack in US history but has no memory of the day that’s been seared into the minds of older generations. His 73-year-old grandmother, Deloris Watson, can recall every detail. She remembers dropping off the then 18-