Robert McNamara quotes
We all make mistakes. We know we make mistakes. I don't know any military commander, who is honest, who would say he has not made a mistake. There's a wonderful phrase: 'the fog of war.' What "the fog of war" means is: war is so complex it's beyond the ability of the human mind to comprehend all the variables. Our judgment, our understanding, are not adequate. And we kill people unnecessarily.
The Fog of War