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(Roman) The process of testing
the water processor on the
ground was an incredible
experience for us. We were the
first ones -- the United States
-- was the first one to actually
design, build and test a water
processor that will take urine
and condensate to produce clean
water for drinking. That had not
been done in space before. So we
had to use a lot of volunteers.
So, a lot of us were volunteers
that donated -- we had over 100
volunteers -- that will come
and donate our sweat and our
urine for testing our equipment.
Basically, it was a trial and
error way of doing things.
There was a lot of modeling,
so the engineers would come and
think how they thought the best
way of doing this would be.
Then, they put it on drawings,
and people would build the units
and basically tested it for
months and months and months
until we were happy with the
results. And, then, we did it
all over again. It took about
15 years of testing to produce
the water -- constant water --
that we wanted and the quality
of water that we wanted
and we needed