I'm an Army photographer - ex-infantry.
So we go armed the same as everyone else. The pistol is more useful than the rifle in emergencies, as I can actually get to that in a hurry. The issue webbing holster you see here has now been replaced with a Blackhawk Special-Ops holster which is far more convenient.
The 'Army' view is that we're soldiers first and foremost - as demonstrated about 15 minutes before this photo was taken when I had to use that bloody rifle as the Marines I was with hadn't spotted the two Taleban shooting bursts of AK-fire at us as we de-bussed form the armoured truck that took us to the drop-off point. Annoying, as I then had to clean it...lol
My primary role as I see it is to record everything, but I am a soldier - I take a keen interest in what's going on and if it isn't going the way I think it should I'd have no qulams about taking over if I think a junior commander isn't up to the job - luckily I actually have the experience to back that up.
Hinting usually does the trick though...less invasive that way...