It seems like ethics would be something that would be easy to abide by. Apparently though it is much more difficult than that because when researching the Challenger explosion, people at NASA knew that there were problems and decided to put people's lives at stake. Again, I would assume that ethical decisions involving the lives of people would be among the easiest to follow. That assumption, however, has been disproved many times.
I was also surprised that the reports mentioned so little about the people in the disaster. In the world of major tragedy (especially those that could have been avoided) I guess it is much easier to avoid the whole idea that people were involved, at least by those who could have stopped the loss of life.