The Superfuze is undermining strategic stability March 17, 2017
Hans M. Kristensen, Matthew McKinzie, Theodore A. Postol The Bulletin
The deployment of the new MC4700 arming, fuzing, and firing system on the W76-1/Mk4A significantly increases the number of hard target kill-capable warheads on US ballistic missile submarines.

This vast increase in US nuclear targeting capability, whichs has largely been concealed from the general public, has serious implications for strategic stability and perceptions of US nuclear strategy and intentions.

The significant increase in the ability of the W76-1/Mk4A warhead to destroy hardened targets-including Russian silo-based ICBMs-derives from a simple physical fact: Explosions that occur near and above the ground over a target can be lethal to it. This above-target area is known as a "lethal volume"; the detonation of a warhead of appropriate yield in this volume will result in the destruction of the target.

FIGURE 2. Missiles with fixed height-of-burst fuzes can overshoot or undershoot the "lethal volume" (shown here by a gray, dome-shaped line), limiting their ability to destroy hardened targets.

Analysis of damage with Superfuze

List of nuclear close calls

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