Write a short, clear, factual news headline based on this article: Israeli Prime Minister Benjamin Netanyahu said Israel and the US launched a joint operation against Iran to counter what he called an “existential threat.” He urged Iranians to “take your destiny into your own hands.” President Donald Trump said US forces had begun “major combat operations”.

Please rewrite the following news article into a professional, SEO-friendly English report in 400 to 600 words.
Article:
Israeli Prime Minister Benjamin Netanyahu said Israel and the US launched a joint operation against Iran to counter what he called an “existential threat.” He urged Iranians to “take your destiny into your own hands.” President Donald Trump said US forces had begun “major combat operations”.