-[woman] The resources that we provide out here
are the difference between life and death
for many people.
It sounds good, four waters.
-[Ahl Tamar] On a typical day we'll wake up,
we'll load the trucks with supplies,
and we'll drive on back country roads,
to then hike into even more remote areas,
inside canyons, on top of mountains,
and washes, to leave water and food
in strategic places
where we hope that they will be found
by people who need them.
♪[music playing]
-[Katherine B.] Migration's still happening,
and it has actually not been deterred.
So, people end up just dying in larger numbers,
or are faced with bigger dangers,
like longer stretches of being in the wilderness
and rural areas without access to water
and other things that they need.
That we can leave some extra water,
in case we run into anybody who need some.
-[Ahl] Here, right here.
-[Katherine] A really common cause of death
out here in the desert is dehydration.
But, we also see people who die
from poisonous plants and animals,
from drinking contaminated water,
when they are lucky enough to find it,
as well as bodily injuries.
"Do you want a hand?"
Since December 2016 alone,
we found over 11 sets of human remains.
♪[music playing]
-[Robin Reineke] This is the cooler,
or the morgue.
It's through these doors,
that nearly 3,000 human remains of migrants have been brought,
in the last 15 years.
Colibri works very closely
with the Medical Examiner's Office,
to help identify the remains of those who have died,
crossing the US-Mexico border.
When a body comes
into a Medical Examiner's Office,
already something has gone wrong.
We don't know how they died, why they died,
they were hurt or killed,
or we don't know who they are.
And in the case of migrants,
this office examines hundreds of people
that we believe to be migrants,
because they've been found on migrant trails,
and they're carrying foreign ID cards, and water.
♪[music playing]
-[Robin] If you look at those statistics,
what prevention through deterrence did,
is it focused surveillance on the urban points of crossing,
leaving open wide expanses of desert and sea.
So, that spike in the early 2000's,
we can attribute to a shift in US Federal border policy.
We had 10 times the number of deaths,
and continue to have deaths in the hundreds,
in southern Arizona,
because of the way that the border is policed.
♪[music playing]
-[Jim Chilton] The cartel controls everything
on the Mexican side,
and frankly, most of my ranch.
We don't have a fence or a wall,
and there are literally 200 trails coming across
that the drug packers use.
Come on over here,
you can see that I literally have,
maybe, 100 carpet shoes.
They don't leave tracks.
They're found around the house here,
and it kind of demonstrates
that people are coming across my ranch
to bring drugs through.
How would you like drug-packers coming to your backyard?
That's not acceptable.
It's a national security problem and it's a humanitarian problem,
to a large extent.
It's just awful to have people die on your ranch.
I know, it is terrible.
I support Donald Trump's desire to secure
the international boundary,
because I know this area,
perhaps better than anybody else.
And I support the idea, personally,
that we need a legal way
to get people into this country to work.
With a knock on the door,
I come out like this, and, "Hola, Agua?"
That's water of course, and usually they say: "Sí, Sí."
And I keep my gun between me and them,
and I go over here and turn the hose on.
I don't care whether they're drug-packer
or an undocumented worker.
I want them to have water.
♪[guitar music playing]
-[Ala] In the dessert,
water is the symbol of life and survival out here.
[in Spanish]
Until till we're a world without borders.
And this is my rendition of the mountains here.
[laughing]