A blown up shuttle here and there and pretty soon you are talking real risk image management.
First shuttle was lost due to a poor management decision, influenced by politics. (They wanted to maintain launch schedule for political reasons.)
Second shuttle was lost due to a poor engineering decision, influenced by politics. (For political reasons NASA switched to a "green" foam insulation on the fuel tank,
and stayed with it, even though NASA's own website covering previous launches indicated pieces were coming off.)
Note the common influence in both disasters.
And they are no longer hiring the best and the brightest. One of the trade journals I read had a letter from a NASA manager - he had an opening to hire someone, and was told that even though he could
interview anyone he wanted, the person he hired
would be a black woman. I've heard elsewhere that "diversity" was the new driving factor in NASA hiring, since the agency workforce was "too white."