While one is training, you have two watching the trainees. A recent change is, that ALL soldiers advising or training are to keep their firearms "loaded". Yep, they were telling them that they didn't need their guns loaded .... so , in the gym incident, he was probably following policy and not carrying nor had a loaded firearm handy at all.

An empty gun is of no use. Comes from people doing armchair quarter-backing for those in the field, or political correctness. There is no such thing as political correctess when your life is on the line.

My .02 cents.