CIMSEC – A common saying in safety organizations is to consider the “half-life of scared” as a measure of the decay of institutional urgency after an accident. In 2017 the U.S. Navy lost 17 sailors in two tragic collisions that prompted an assessment of how the Navy looked at fatigue, human-centered system design, and an overzealous “can-do” attitude. The United States Fleet Forces Comprehensive Review (CR) recommended 112 corrective actions. In the ensuing two to three years, the Navy checked off all those actions as complete and built a system to ensure that the changes were enduring – as recommended by the report. Recent events, however, specifically a series of Class “A” mishaps in the past year, call into question the effectiveness of those changes across the Navy enterprise.