Earth-Penetrating Capability of B61-12 Nuclear Bunker Buster? Explained: Hans Kristensen of Nuclear Information Project

Hans M. Kristensen :director of the Nuclear Information Project at the Federation of American Scientists where he provides the public with analysis and background information about the status of nuclear forces and the role of nuclear weapons.

https://fas.org/blogs/security/2016/01/b61-12_earth-penetration/