Israel and Iran have opened a new chapter in their long history of conflict. Israel launched a major attack with strikes early Friday that set off explosions in the Iranian capital of Tehran.

Prime Minister Benjamin Netanyahu of Israel presented Iran’s sophisticated ballistic missiles as a critical threat to Israel’s survival.

Israel’s historic strike on Iran revealed years of Mossad activity inside the country, including hidden weapons, drones and assassinations of nuclear officials.

The Lebanese militant group Hezbollah was long considered Iran’s first line of defense in case of a war with Israel.

Israeli Prime Minister Benjamin Netanyahu vowed the operation “will continue for as many days as it takes,” while Iran has pledged to retaliate. Stavridis warned that despite