Treaty on the Non-Proliferation of Nuclear Weapons

The foreign secretary says UK forces are on high alert in the region, as Israel-Iran attacks continue.

Israel's PM says it struck Iran at the heart of its "weaponization programme", but Iran insists its nuclear facilities were peaceful.

The US has previously warned that Russia is trying to develop a space-based, anti-satellite weapon.

A new nuclear arms race, the Ukraine war and climate change were all factors considered, say scientists.

Reality Check takes a look at the facts and figures behind the world's nuclear weapons

President Hassan Rouhani says it is responding to Sunday's incident at the Natanz nuclear facility.