France open to hosting nuclear weapons on allied soil / Which countries have nuclear weapons - and how many? New report gives details / Israel, US agree that Iran must not have nuclear weapons -- Netanyahu / Iran does not aspire to develop nuclear weapons -- president / Ukraine uncapable of building nuclear weapons 'now or in the future' -- expert / In Iran, war jitters fuel public support for developing nuclear weapons / Bigger number of nuclear countries raises risks of nuclear weapons use -- IAEA chief / Vladimir Putin warns west he will consider using nuclear weapons / Why Many South Koreans Want the Country to Have Nuclear Weapons