April 19th has come again this year, but it never quite goes. How can it? It stands out like a scar. It may no longer be the bleeding wound it was on that first April 19th -- except to those who were there and in a way still are. And can never leave. Their lives, their families, even their memories will never be whole again. The explosion that tore through the Alfred P. Murrah Federal Building in Oklahoma City, reducing it to a burned-out hulk, left more than an unforgettable stench in the air. It left a gaping hole in...