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The Untold Story with Martha McCallum, exclusive interviews with top newsmakers who share their inspiring

stories of perseverance, positivity, and more. Now, here's Martha McCallum.

I am pleased today to be joined by President Trump's former National Security Advisor with his

untold story for our podcast.

He is retired three-star General H.R. McMaster, author of the new book out today,

Battlegrounds, the fight to defend the free world. General, great to speak with you again.

Thank you so much for being with me today.

It's great to be with you, Martha. Thank you so much.

So tell me the inspiration for this book and what you really wanted to get across

about where you see the most important threats to the world today

and what the United States should be doing about them.

Well, thanks, Martha.

What I hope to do with the book is to generate a better

understanding of the most crucial challenges that we face as a basis for working together

to build a better future for generations to come. And Martha, I'm concerned, I think as many

Americans are, that we're so polarized and we're so

...