Actually a safety stand down is a common occurrence in military aviation. We would have one at least 2x a year with one of them right before the winter holiday season. In this case the Marines have had 3 Class A mishaps, ( Total Property Damage, Fatality/Injury. A, $2,500,000 or more and/or aircraft destroyed, Fatality or permanent total disability), in 6 weeks with a loss of life in two of them. I can fully understand the need for them to stop, step back and hold the stand downs. It help every one reset their thinking. It not only involves the fliers but the groundpounders (staff, admin, maintenance) as well.
bob