[steam for ever]

Look at it this way.
This a pplies to airports as well.
A terrorist when you think about it is not going to waste time in a place where he is going to be caught is he?
I read an article the other day about airports stating that at the Norfolk RAF bases no less, aviation enthusiasts are WELCOMED by personel to look out for the abnormal.
If the military use transport enthusiasts then it proves it, we are the governments greatest weapon against terrorism, we know what is normal and what is not.