In article , Dana wrote:
There are some devices that use the priciples of a MRI and shrink it down to
a hand held sized device to scan for explosives. Since the compounds in
explosives give off a unique signature after being exposed to a strong
magnetic field,

That signature ... would it be from the azide bonds in a heavy metal
azide, from the nitrate bonds in RDX or PETN cubane nitrate, or from the
nitrate bonds in the current scare-of-the-month acetone derivatives? It would
be a breath of fresh air if it were.
(If your chemistry isn't good enough to spot the trap in this question,
be very, very careful.)

--
Aidan Karley, FGS
Aberdeen, Scotland
Written at Sun, 15 Oct 2006 12:14 +0100, but posted later.