I've been doing photography in and around Beirut airport for some time. Othes have done ot before me as well. It quite nice as there are some spots that you really get close to the rwys and at times get the beautiful moutainous background.
The airport security says it's not allowed but at the same time thay say that "do whatever you like as long as you're outside the airport fence. So sometimes they are tough and sometimes they just don't even bother asking anything.
I have been questioned on the spot a few times and after doing identity checks again on the spot, they said it was okay. I always tell them I'll leave if you want but they don't care about the photos and just want to make sure that they are maintaining the airport security.
I can't tell how they would react if there were a group of photographers walking around the fence. Maybe that would draw more attention. I don't know.
I think once you're here, try to go there and check some of the spots. If I can make time, I can help as well since I know all the "good" spots.
Unfortunately, after the war in July, my favorite spots are now unaccessable. Most of the debris from the destruction was desposed over those areas and now these are being processed.
You can see the debris in the background of this photo:
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Photo © Vatche Mitilian
It's from that spot that I have taken photos like these:
This is in a nutshell
Let me know if you need more.