were they armed?
In the other vid I thought I saw two hand with no gun between them on a couple of guys.

And what's up with murdering a wounded, combat ineffective man? We kill active enemy combatants, gunning down wounded was practiced by the nazis, imperial Japs, and chi-coms, all of whom I consider war criminals.
Shooting a wounded man was not only uncalled for, but it sure as hell was a waste of money too, you know how much 50 30mm DU rounds cost?