As Israel continues its ongoing war in Gaza and its offensive against Hezbollah in Lebanon, the Middle East continues to await Israel's vowed response to Iran's recent ballistic missile attack. NBC News' Matt Bradley reports from Beirut and breaks down the events leading to the strong possibility of Israel striking Iran.

Iran launched nearly 200 ballistic missiles into Israel Tuesday night in what the regime said was a direct response to the deaths of Hezbollah chief Hassan Nasrallah and a senior Iranian Revolutionary Guard Corps figure.

Guterres' comments Tuesday came shortly after Iran said it fired dozens of ballistic missiles at Israel. The Israeli military said its army has crossed the border into Lebanon and is conducting “localized ground raids” on Hezbollah positions.

Iran launched more than 180 ballistic missiles at Israel in what it said was in retaliation for last Friday’s assassination of Hassan Nasrallah, the chief of Lebanon-based militia Hezbollah.

With Israel poised to attack Iran, having already blindsided friends and foes alike with its blitz against Lebanon's Hezbollah movement, all the talk is of an inexorable slide towards a new, pan-Middle Eastern war.

Israel is less likely to hit the oil facilities that underpin Iran's economy or its nuclear sites, according to many of the experts interviewed, who include more than half a dozen former military, intelligence and diplomatic officials from the United States and Middle East.