I'd think that frangible bullets would be the better option to
minimize collateral damage and take the risk that the hijacker might
be wearing body armor.
This was pretty thoroughly hashed over on the newsgroups some months
ago. As it happens, I just recently posted one of the better responses
on my website:
http://www.warbirdforum.com/airliner.htm
To me, it pretty much demolished the notion of "explosive
decompression." The author also goes into the subject of bullets used
by sky marshals.
all the best -- Dan Ford
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