I wonder what security is there for if it's not to question suspicious characters? The security officer might be young but that is no excuse for not questioning an individual who is sweating, fidgety and carrying a heavy rucksack. I don't think poor training, or inexperience is an excuse for not questioning any individual who is behaving suspiciously. Surely common sense should have at the very least led the 18 year old security officer to ask his supervisor for advice.