Estimated Nuclear Weapons Locations 2009

The world’s approximately 23,300 nuclear weapons are stored at an estimated 111 locations in 14 countries, according to an overview produced by FAS and NRDC.Nearly half of the weapons are operationally deployed with delivery systems capable of launching on short notice.

The overview is published in the Bulletin of the Atomic Scientists and includes the July 2009 START memorandum of understanding data. A previous version was included in the annual report from the International Panel of Fissile Materials published last month.