New Nuclear Weapons 

One of the key debates underway in U.S. nuclear weapons policy is whether the U.S. will pursue new nuclear weapons designs that might have enhanced capabilities and may be perceived as more 'usable'. In particular, debate is currently centered around an earth-penetrating nuclear weapon and a low-yield nuclear weapon.

Links:

Fire in the Hole: nuclear and non-nuclear options for counterproliferation

Interview with C. Paul Robinson

Linton Brooks memo on nonproliferation impact of new nuclear weapons

Monterey Institute analysis of mini-nuke and 2002 NPR

Pursuing a New Nuclear Weapons Policy for the 21st Century