Thanks, HiJinx. There are contradictory reports going around on this. I'm going to go with your report, unless and until we learn differently.
I also understand, from a report that quoted a NG Major, that the NG calls in BP when they spot aliens but otherwise they are allowed to defend themselves. I would take that to mean they could return fire if fired upon.
I can't wait to hear the results of the investigation into this incident, as well as a statement of the rules of engagement. I doubt that that will happen, unless...
I may drop a hint in the ear of a local reporter, one who has a good relationship with the military and who may actually want to get that kind of information out to his reading public.