I remember being reminded when I was in the military that the Japanese attacked Pearl Harbor on a Sunday. 

This was supposed to encourage those stuck with "the duty" to pay attention.  

The best and the brightest are seldom at work on the weekend in a 24/7 organization.

Usually in the military the OD was the SLJO.  (Sh***ty Little Jobs Officer) and the NCOIC was the guy who was overweight, under-enthused and work averse but had been around long enough to keep the SLJO from screwing up too badly.  

In the civilian world it seems to be the newest, most underpaid and risk averse.  Sometimes all three!