ALH84O01 is just one sample of Mars rock; albeit the
most famous (infamous).
I seem to recall that there are at least 20 other large samples of Mars meteorites; one of those rocks has minute samples of organics inside
if I recall [Not the infamous so-called fossils].

At least one Mars meteorite has samples of hydrated
minerals inside.
Basic conclusion drawn?.... Hydrated minerals in a Martian
meteorite = liquid water on OR under Mars in the
past.

Contamination?
I for one don't believe that osmotic contamination,
or even penetrational contamination by capillary-action
of the interior of those Martian meteorites is/was very-likely at all....
I don't believe terrestrial contamination of the interiors
of those Martian Meteorites has taken place...unless
they were found in water on earth.

In fact, I believe that those Mars meteorites found
in the bone-dry regions of Antarctica and the Sahara
are THE MOST uncontaminated, the most pristine
samples of Mars we could wish for and hope for.

Incidently, did you read my thread quoting liberally
from a geology dictionary on "spherulites" and their
hydrated mineral makeup?

So what if the spherules are volcanic in origin?
(many volcanic eruptions on earth spew out abundant
H20 heated and mingled with other material).
So what if those spherules are "glassy"; the outcome of vitrification?
it wouldn't rule out the fact that hydrated minerals are in
its makeup.

cheers.

Jacob

Jacob