This is 99% invisible.

I'm Roman Mars.

On a Friday evening in the summer of 2011, Los Angeles resident Brent Green was driving home

from work. It was coming from a job site and

took a route he doesn't usually take to get to his neighborhood.

And I might not have come this way. I mean, I'm glad I did because when I saw this I knew that it was a problem and I got out of my car

What did you see? That's our producer Sam Greenspan. He met with Brent in Los Angeles. I saw about 25 to 30 guys with heavy equipment all wearing orange jumpsuits.

They had back hose, they had trencher, trenching machines, I mean like large tractor material.

They were like stuff that you can't just like ignore it.

You and I might not think there's anything weird about a bunch of guys doing

work on a freeway berm, but Brent took one look and thought, well this all seems

kind of fishy. For starters it seemed late for a city work crew to be doing

landscaping. And I said that's odd that it's almost seven o'clock. They're not even out here at seven o'clock so what are they doing they got to be up to something?

The crew was manicuring some trees and a fenced off piece of land next to a freeway in what had long been a low-income neighborhood.

It's a patch of land that never gets landscape.

The only reason the trees were there was because about 40 years ago, some birds flew over and

pooped out fertilized seeds.

And no one ever touched them.

It's not like they're just cleaning the tree up

to make it look better on the freeway.

Look at all the rest of them.

They all look like crap.

...