US nuclear weapons scientists are designing a warhead that is meant to be 'reliable' without ever having been tested. Geoff Brumfiel, Nature's physical sciences correspondent, asks whether it could renew the United States' ageing stockpile.
News Feature
Nature 442, 18-21 (6 July 2006)
http://www.nature.com/nature/journal/v442/n7098/full/442018a.html