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If the late show's hot show wins, you can call them.

Folks, my next guest is the former Secretary of Energy, CEO of the Nuclear Threat Initiative and President of the Energy Futures Initiative.

Please welcome back to the late show.

Secretary Ernest Moniche.

There's been so much talk lately about the possibility that Putin might fire off what has called a tactical nuclear weapon or a battlefield nuclear weapon.

And just seems to me that not enough attention is being paid to the idea of what tactical means versus strategic.

And I was hoping you could define that for us because I feel like this whole subject is just being soft enough for us in ways that it's just not healthy.

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