I'm not in the field, so it is definitely possible that my way of looking at it is just completely wrong-headed, but -- what about repeating the attack? If the program had remained hidden, maybe they could re-use some parts? Also, is it possible that other parties (badguys) gained some capability by analyzing the program?
How could it remain hidden? The programme heads would think it was an accident? This was a devastating setback to the entire programme. There would surely be an investigation to ensure a repeat could not happen.
