Nuclear weapon technologies
'Fewer but newer' nuclear arms in the world: report
The drop in recent years can mainly be attributed to the US and Russia, whose combined arsenals still make up more than 90% of the world's nuclear weapons.
Israel is widely assumed to have nuclear weapons, although it neither confirms nor denies it.838 days ago
There are just over 15,000 nuclear weapons in the world. Jim Sciutto explains the potentially catastrophic effect nuclear weapons can have and the technologies to defend against them.904 days ago