Iran vows revenge after Israel uses bunker buster bombs to assassinate Hezbollah's leader

Iran's supreme leader has declared five days of mourning after Israel's assassination of Hezbollah's leader Hassan Nasrallah. Ayatollah Ali Khamenei says the death of the Iran-backed leader will not go unavenged. Israel used what are known as bunker buster bombs in airstrikes in Beirut to carry out the killing that was ordered by Prime Minister Benjamin Netanyahu. While supporters of Nasrallah across Lebanon, Iraq and Iran are in mourning there have also been celebrations after the killing of one of Israel's longtime sworn enemies.