Muillenberg's assurances that they will fix everything on their own are not very convincing. The existence of such a terrible design -- a single sensor that has complete control over the horizontal stabilizer -- points to one or more teams or management chains within Boeing that are turning out shoddy work. They have undoubtedly turned out other shoddy work, and will likely continue to produce more shoddy work that will kill more people. An outside team needs to be brought in to investigate engineering and management. Immunity against lawsuits and job losses need to be assured, but we need to discover exactly what led to this so more terrible engineering ideas don't find their way into the next crop of airliners that we will be trusting our lives to.