Originally Posted By: pca
Some very brave people were lost on those occasions. At least partially due to the management not taking things seriously when they should have listened to the engineers. The Challenger disaster was entirely avoidable. Columbia, not quite as clear cut, but even so some major mistakes were made and people paid for it with their lives.

Two of the engineers that tried to stop the launch came forward for the 30th to tie their name to the warnings. Really a shame the toll it's taken on Bob.

Overall the Challenger disaster seemed to have shaped NASA for the better.

http://www.npr.org/sections/thetwo-way/2...-blames-himself