Israel is pressing its bombing campaign against Iranian cities and nuclear sites as US President Donald Trump demands "total surrender" from Tehran and considers entering the conflict.
BBC experts and correspondents answer your questions about what is happening - and what could happen if the conflict escalates.
Israel's position on this is that it has no choice, that it believes in the last few months Iran was accelerating towards building a nuclear weapon, and that talks aimed at curbing Iran's nuclear programme were going nowhere, and that therefore this was the last resort.
They have said they see an existential threat from Iran, and have argued that if Iran acquired a nuclear weapon it would use it because it has previously vowed to destroy the state of Israel.
That Iran was close to building a nuclear weapon is not necessarily a view shared by the rest of the region, and it is not necessarily shared by the International Atomic Energy Agency, nor is it shared by the last open source report we have seen from US intelligence which did not say that Iran was about to produce a nuclear weapon.
