Israel’s attack on Iran was long in the making – the result of years of meticulous planning by Israel and days of high-stakes talks between Tel Aviv and Washington, officials told CNN.

Israel unleashed airstrikes across Iran for a third day and threatened even greater force as some Iranian missiles evaded Israeli air defenses to strike buildings in the heart of the country

Israel’s defense minister issued a stark warning to Iran on Saturday, saying that “Tehran will burn” as the two nations traded missile salvos following Israel’s surprise attack on Iran’s nuclear program earlier this week.