Iran's supreme leader, Ayatollah Ali Khamenei, has defended Iran's missile attack on Israel, calling it 'fully legal and legitimate' and warning that it will be done again if necessary. Khamenei also praised the Hamas attack on Israel and urged Tehran's allies to increase their efforts against a 'common enemy'. The missile attack was in retaliation for Israeli strikes on Lebanon that killed Hezbollah leader Hassan Nasrallah and other members of the group's top command. Khamenei's speech comes amidst escalating tensions in the region and fears of an all-out war.