Defense Secretary Leon Panetta is expressing new concerns about Iran’s underground nuclear program. Washington Post columnist David Ignatius reported Panetta said
Panetta believes there is a strong likelihood that Israel will strike Iran in April, May or June — before Iran enters what Israelis described as a “zone of immunity” to commence building a nuclear bomb. Very soon, the Israelis fear, the Iranians will have stored enough enriched uranium in deep underground facilities to make a weapon — and only the United States could then stop them militarily.
Israeli Prime Minister Benjamin Netanyahu doesn’t want to leave the fate of Israel dependent on American action, which would be triggered by intelligence that Iran is building a bomb, which it hasn’t done yet.
Israelis are said to believe that a military strike could be limited and contained. They would bomb the uranium-enrichment facility at Natanz and other targets; an attack on the buried enrichment facility at Qom would be harder from the air. Iranians would retaliate, but Israelis doubt that the action would be an overwhelming barrage, with rockets from Hezbollah forces in Lebanon. One Israeli estimate is that the Jewish state might have to absorb 500 casualties.