I've done some amount of aviation, both civilian and military, and our training officers were always fond of reminding us that the history of most aviation guid

I've done some amount of aviation, both civilian and military, and our training officers were always fond of reminding us that the history of most aviation guidelines could be traced back to a death or two. I think it's easy to forget, coming from a profession that is inherently experimental and forgiving, that some mistakes can only be made once.