When there is a large block of dense, material, do you think the screeners will just pass it because they don't see a gun?
Explosives also give off a different colored signature on the x-ray. The newer CT EDS machines that the TSA is blowing billions of dollars on might have better resolution were it not for the 30% false-positive rates and unknown false-negative rates.
But of course you knew both of these things too and just chose to ignore them as well...
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by LarryJ:
Guns are probably the easiest weapon to detect on the Xray though the detection rate can be reduced by careful placement and surrounding them with material of similar density.
Explosive devices, on the other hand, can be made of items that look quite routine in a piece of luggage. That is why they are using the sophisticaed 3D MRI-type machines for screening checked luggage and even those are unable to completely clear all bags.
But you already know that, you just choose to ignore it.</font>
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