Hello again, I'm Orin Analdi.

Last year, before his inauguration, President Trump was briefed about Russia's attack on America's electoral process.

The evidence included texts, emails, and a human source so close to Vladimir Putin that intelligence officials didn't want to write down the name.

That's according to David Sanger of the New York Times. Ever since, Mr. Trump has tried to dispute

those findings as he did standing next to Putin after their meeting in Helsinki.

Sources in the Trump White House say that's because the president fears the story will cast doubt

on his election

victory in 2016. Now he's contradicting his own director of national intelligence, Dan

Coates, who says Russian cyber threats are still blinking red in the run-up for this year's

elections. Now that's raising questions about the threat of cyber warfare and how it works,

and David Sanger has made that a specialty. The atomic bomb has been called the ultimate weapon.

Sanger's latest book is titled The Perfect Weapon. The subtitle is War, Sabotage, and Fear in the Cyber Age.

He reports that nations around the world, including the United States, have been slow to recognize another weaponized technology.

And there's a special challenge. Everybody's connected to the Internet.

David Sanger, welcome as always.

Thanks, Warren. Great to be back with you.

What makes for a perfect weapon? What do you mean by that?

Well, nuclear and cyber are frequently referred to in the same sentence, as if the themes, the methods, the technologies, and the politics that we used to try to prevent

nuclear war from breaking out would also help us in preventing cyber conflict from breaking

out.

In fact, they're entirely different.

Nuclear weapons are only possessed by nine states. Cyber weapons are now possessed by

...