i have a similar story to this that happened to me in tampa, florida
i was about to board an american airlines flight and it was about 10 minutes before boarding time and i was just sittin there watchin people walk by etc etc just to pass the time
then i notice this "muslim-looking guy" but he was wearing like regular clothing not muslim turban or anything like that....and he was just sittin there alone looking out the window at the plane...i didint think twice i just kept looking at random people and thinking about my trip
then they started boarding the plane...and i notice this guy takes out a phone...okay thats nice still didint think twice about it....they board everyone and i was about to get on the plane (last person) and i glance over at this guys phone while walking over and i notice he was taking pictures on the phone of every1 outside the window like i guess the people fueling the plane/loading bagage and gettin it ready and stuff (he was like zooming in and i was looking at each pic being taken so dont say that he was just playing with it and taking pics or w.e)....and then i realized he wasnt boarding the plane (you needed a boaridng pass to be where we were....)...so hes just this dark skinned arab guy, at the boarding area, trying not to stand out, NOT getting on the plane (sketchiest part), taking pictures of stuff being loaded onto it and the peolpe getting on....which really freaked me out esp the part that he wasnt gettin on the plane
so i told my dad about what i saw (im only 17 so i wanted his opinion on what to do) and then we went up and told the guy who worked for american airlines, and he said ok thanks alot and called up security and they were on their way to ask him some ?s and then got on the plane and had a safe trip...i still dont know what happened to the guy but hopefully he wanst doin anything suspicious
idk if i did the right thing but i figure better be safe than sorry