Why has Israel attacked Iran? Nuclear fears, proxy wars and decades of rivalry explained

Why Israel attacked Iran: Israel has launched a 'pre-emptive' strike against Iran on Saturday, a major escalation following weeks of negotiations between US and Iranian officials over the country’s nuclear program. Iran and Israel were friends but things took a U-turn after the 1979 Islamic Revolution and after Supreme Leader Ayatollah Ruhollah Khomeini came to power.