Air Force Gen. Paul Selva argues that for nuclear deterrence to work in the 21st century, the U.S. may need a little less bang for the buck.

Selva, vice chairman of the Joint Chiefs, confirmed has confirmed that as part of the Pentagon’s ongoing nuclear posture review, it is looking at a new generation of low-yield “mini-nukes” in order to ensure that the threat from America’s nuclear arsenal remains credible.

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