Barack Obama, the US president, had planned a sharp reduction in the arsenal as part of a new strategy to be outlined in the Nuclear Posture Review.
White House officials say the finished document will call for more reliance on using conventional weapons as a deterrent.
The review is also supposed to get rid of a programme to develop a nuclear weapon that can detonate underground.
Al Jazeera's Patty Culhane looks at what Obama promised exactly. (Mar 2, 2010)
Published by i On Global Trends - Mike Hitchen Online - news, opinion, analysis
See also Sydney Irresistible and for personal comment, Mike Hitchen Unleashed
Putting principles before profits
See also Sydney Irresistible and for personal comment, Mike Hitchen Unleashed
Putting principles before profits