It is a strange irony of history that the person you're about to be introduced to will be forever linked with Che Guevara,

because the two men could not be more different.

Che devoted his life to tyranny and death, and this man has devoted his entire life to freedom and life.

He played an important role in stopping Che's murderous quest for communist revolution all around the world,

alongside Castro Che terrorized Cuba, the nation where my next guest was born.

So it was fitting, I guess, strangely, as you hear him tell the story, that he was there in the mountains of Bolivia in 1967

to be the man who heard Che's final words.

He was in the CIA, he was part of the Bay of Pigs disaster, he was in Vietnam, played a huge role there.

He put a price on Che's head, and because of that had a price put on his head.

He also fought communism in El Salvador in the 1980s.

He was a victim of a witch hunt by a US senator.

He participated in some of the most pivotal events in the last 50 years of US history, and has a different look at even the JFK assassination.

But in the end, as he's written in his memoir, he is just a man from an island nation of Cuba, who's just having a really hard time getting home.

Today, the man who helped capture Che Guevara.

I've interviewed celebrities, I've interviewed presidents, and my staff doesn't usually get excited.

You, on the other hand, everybody is very excited to hear what you have to say, because you have been not just a witness.

You've been right there, and a catalyst in many cases, of some of the biggest stories since Kennedy, since Castro went into Cuba.

And I can't wait to get to the part about Che and to hear what he was really like from somebody who met him, talked to him.

And I gather in some way, kind of liked him, appreciated him at the end as a human being when you were talking to him, because you were extremely kind to him.

Yes, he was very hard. I had in my mind what he had done, the people who had assassinated.

But then when I first saw him, the image that I had from him was completely different.

Here's a man that was completely in rack. He looks like a beggar.

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