"Liquid explosives, were to be used."
The current security checks seem to back up that theory. I just head from a colleague that one of the ONLY things anyone is being allowed to carry-on is baby milk or baby food, but that people are only being allowed to take that on board if you are willing to drink/eat some in front of the secuirty folk first!
I'm guessing that any jihadist who has already decided that he is going to kill himself (and hundreds of others ) for Allah will have no problem in risking a tummy ache from ingesting something evil that is designed to look like food if that will allow him to complete his evil mission.
Many people are going to die unless they start getting serious about security and begin some effective profiling.....