He was in The Signals regiment but given his age, he could not have been very high up in rank, So he would only have access to the level of stuff that every other normal bod would have and most, if not all could easily be researched on the net by anybody in any country. I can not see Iranian security forces being very interested in what he would have been able to give them. The fake bombs. Well unless he had access to the materials to make the real thing, That i doubt. Then again i can not see how he being branded a terrorist, He was obviously judged to be of such low risk that he was sent to