As hundreds of rescue workers waited on the ground, United Airlines Flight 232 wallowed drunkenly over the bluffs northwest of Sioux City. The plane slammed onto the runway and burst into a vast fireball. The rescuers didn't move at first: nobody could possibly survive that crash. And then people began emerging from the summer corn that lined the runways. Miraculously, 184 of 296 passengers lived. No one has ever attempted the complete reconstruction...