OK,
What the real story here is the Air Force did not have positive control (On paper and operations) on the location of some of the nukes for about 3 hours.
It was not that they were on a plane (guess how we move them to different areas in the US) it was they where not managed properly. If the process was followed the correct way, there would never been a story. Just another B-52 flying from point A to point B.
Would it have been bad if the aircraft had crashed, sure, the convent could have detonated, but the nuke would have not. There would be radiation if the pit was breached, but no big bang.
The other thing to think about is a C-17 flying from somewhere in the US with 25 2000 lb bombs on it. If it were to crash and the weapons cook off it would be a big bang (much bigger than the conventional in a nuke).
They lost positive control of the weapons. They were under AF control (air crew) all the time. The real questions are;
Were they loaded by mistake?
Who directed they were to be loaded and did that person (S) have the authority?
Did the 2 man concept fail? If so, where?
Of course there are many other question that will be asked, many people loosing there jobs and all sorts of other fun the wing will have to deal with. Were we in danger?
NOT