Hi there, I'm Linda Presley and welcome to the documentary from the BBC World Service.

Since President Trump was inaugurated in January, migrants and especially the Board of the US

shares with Mexico have dominated the news. So we thought this was perhaps a good moment to share

with you once again a two-part series Tim Mansell, Ulysses Escamilla and I, made in 2024.

The first part charts some of the fallout from the first Trump administration's policy

of forcibly separating migrant children from their parents on the southern border back in 2017, 2018.

The second part explores the deeply troubling impact of organised crime

and the cartels on migrants as they journey across Mexico towards the United States.

At the end of each part, I'll give you an update on some of the characters we met on this

reporting trip. Here's Border Stories, Part 1.

We're travelling now.

It's just after 6 in the morning.

It's still inky.

It's still dark.

And just in the sky, the moon, like a golden orb.

So we can see

twinkly lights there on the horizon.

Is that Mexico?

The border town that exists right here

is San Luis, Arizona.

And that's on the

U.S. side. And across the

...