A big guy seated in my waiting area was carrying a case of beer in brown bottles, no doubt some "special local brew" he wanted to treat relatives and friends to at his destination. The case of bottled beer was in another brown cardboard box, open at the top but held down with duct tape.
I couldn't believe this, knowing that liquid explosives have been used before to bypass airport security. The Philippino case mentioned above is one example.
I went right to the uniformed airline people and pointed out this unusual "carryone luggage" and asked them if it was permitted. They said "well, if beer is not on the list of banned items, then it's okay to carry on board". Incredible.
Even if none of the brown bottles contained explosives, fuel or accelerants (acetone etc) they could be hurled or broken to be used as 24 weapons.
Somehow, this stupidity did not shock me.
Yousef had deposited his device - lethal liquid concealed in a contact lens solution bottle with cotton-ball stabilizing agents and a harmless-looking wristwatch wrapped around it...I flew two days ago and can attest that contact lens solution bottles are easy to bring onboard.