For national security, this fact may have been better kept secret. One would’ve thought that bridges built more than 33 years ago would’ve had impact protection, it seems like basic engineering. Cost savings usually impact quality & safety. The code didn’t change until 1991. #CorporateGreed #InfrastructureSafety https://www.cbsnews.com/news/francis-scott-key-bridge-collapse-impact-protection-u-s-bridges/