>Magnesium  fires are  extremely difficult  to bring under control, and
>really are  best left to the professionals.

        That is true -- except many so-called professionals do not know what to do
in those situations.  First, imagine yourself as a firefighter rushing to
the scene of a burning vehicle.  What do you first?  Do you get out your
trusty chemical tester and start performing tests for magnesium?  Or, does
the firefighter immediately recognize a "magnesium fire?'"
        There is science, and there is the grim reality of human limitation.  Just
my experience.

HK