From Hidden Brain Media, I'm Shankar Vedantam.

This is My Unsung Hero, stories where one person reached out to help another in a time of need.

My Unsung Hero was my...

Max saw me, came over and asked how I was doing and if I needed help.

So whoever you are, thank you so much.

This week's story comes from Walter Delgado.

Walter grew up in El Salvador.

When he was young, his mother moved to the United States to earn money for their family.

So Walter lived with his grandparents.

My mom one day called me and she said, do you want to come to the United States?

And obviously I was 11 years old and I kept hearing good things about the United States.

And I said, yes, when do I leave?

The first part of the trip, we were traveling in buses.

It was all the way until we got to the Mexican border with the USA that that's when things got serious.

And we were all in a warehouse.

And I'm talking about like 200, 300 people in a big warehouse.

And one time they came and say, okay, we're ready and we're going to walk through the desert an entire night.

And that's when it hit me.

I was, wow.

I was traveling with my grandfather.

And I was 11 and he was old.

So I was like, this is going to be rough.

...