>then weapons designed to target underground facilities This is the most likely scenario for tactical nuclear to happen in the current state of things, especia

>then weapons designed to target underground facilities This is the most likely scenario for tactical nuclear to happen in the current state of things, especially given Iran's facilities. Not saying likely, just most likely. I don't know if it's a technical limit, or just what happens to be currently available, but: >the GBU-28 used its large mass (2,130 kg or 4,700 lb) and casing (constructed from barrels of surplus 203 mm howitzers) to penetrate 6 meters (20 feet) of concrete, and more than 30 metres (98 feet) of earth.[11] The B61 Mod 11, which first entered military service after the Cold war had ended, in January 1997, was specifically developed to allow for bunker penetration, and is speculated to have the ability to destroy hardened targets a few hundred feet beneath the earth. I assume we could design a non-nuclear to penetrate to comparable depths as the nuclear, but the nuclear will always have the yield advantage, and therefore greater effective depth. https://en.m.wikipedia.org/wiki/Nuclear_bunker_buster https://en.m.wikipedia.org/wiki/Nuclear_bunker_buster