Originally Posted by
TSO1973
but to be fair, are the knives in the picture you linked metal or plastic? can't tell from the image alone. if metal, then it's not a valid argument as the wtmd should be picking it up
Originally Posted by
gsoltso
There are tons of items that can be concealed with a belt, like the knife above, detonators, wiring,
even a sheet of explosive, just about anything you can think of to cause damage to an airplane or the people on it, can be concealed within or attached to a belt.

bolding mine: careful......the x-ray machines do not detect explosives on their own. if a sheet of explosives, it would have to be of a different density than the belt so it would show the contrasting image of the sheet against the belt