I'm Julia Lungoria, this is the experiment.

In this week, we're featuring a story from our friends at Radio Lab.

That's the show that helped correspond in Tracy Hunt and I get our start in Radio.

And they have a new five-part series, led by producer Simon Affler, about the invention

of the cassette recording and how it changed the course of history.

I'm excited to share with you one episode in particular.

It's the third part of the series about the unexpected power of the human voice on tape

to wage war.

To hear the entire series, it's called Mixed Tape.

You can head over to the Radio Lab podcast feed.

For now, here's episode three.

I'm Simon Adler, this is Mixed Tape.

And before we start today, do you know that feeling, have you had the experience when someone

you love or someone you know has died, and then maybe a week or a month or a year later

you hear their voice, their recorded voice again?

There's something about that.

It's strange, it's eerie, but also precious.

Anyhow, this is the story of that feeling multiplied 3.3 million times.

Welcome to this military training tape.

This tape is designed to be informative to the soldier about making your own ghosts and

spirits and screaming banshees.

This embodied so close to the never-woven between life and the earth.

...