I certainly wouldn't do that without their OK, and hope he will pop in for a comment. I'm sure he has been asked this before...
There might is a basis for providing some kind of credential - Airliners.net recieves a #%&@load of hits every day, and my own pics have been viewed (full size) nearly 100,000 times.
I'm not trying to toot my own horn (god, I hate that cliché
) but we are talking about a pretty widely known medium here.
The only thing you should feel when shooting a terrorist: Recoil.