OK
We put 100ft high fences around small airfields.
We put xray machines at every small airfield.
What's to stop the next Joe Bloggs (or Herman the German!) learning to fly and then, without any tweasers/nail files/gun fly his fully fuelled PA28 into a building?
How are you gonna stop that? Answers on a postcard please...
Anyone remember the guy many years ago who learnt to fly at Bournemouth, and on his 1st solo took it to the coast and dive bombed the pier just missing it? A suicide note was found in his navbag back at the flying school.
My point here is that you can NEVER legislate for every circumstance. The guy here probably had flying experience as he flew a nice smooth approach at FRA I have just seen!
We must al be vigilant and accept extra security, but there comes a time when you musn't give in to the terrorists, by letting them impact on our lives too much - or they will have achieved their goal.