Article: Are the 737 Jets Safe for Return to Our Skies? - 'FAA approves a path for Boeing 737 Max 9s to return to operations', and yet the evidence for the cause of the failure is questionable. Bolts were gone from the doorstop that flew off the jet aircraft, and multiple doorstops had loose bolts. Bolts do not come loose on their own. We are being asked to believe that trained technicians are too stupid to tighten bolts when they build jet aircraft. Make sense to you?