Where do you search for it? Is there a lost and found for nuclear buttons....OK, so it was not a button, but the authentication codes.. same difference.
Bill Clinton, a two time president of the US of A, misplaced ' THE' codes.
So for all of us harried people, lesser mortals so to speak, there is a lesson in there. To never get harried.. So what if you misplace your car keys, or the doctor's prescription, the TV remote, or your cell phone, your spectacles.. after all it is not affecting the future of humanity the way of a nuclear bomb!
Come to think of it, maybe if it had stayed lost, the threat of nuclear war can not be brandished at the drop of a hat. What's so bad about that??