Whilst in the long Q at the Holding point, get a vulnerable feeling as it would be so easy for a truck driven by a 77 virgin hungry cractkpot to crash through a side gate and pick one of the many fully fuelled and packed aircraft to ram and dispatch to oblivion. I hope ATC and security have got a plan in place. If yes, good. Its reasuring. If not, Whoops, here's another hole to plug.