An aggressive counterattack risks escalation. But giving in to U.S. and Israeli demands is an unlikely alternative.

Israel launched “preemptive” strikes early Friday across Iran, amid growing regional tensions and concerns about Iran’s nuclear capabilities.

Follow the latest news after Israel launched strikes at Iran, a dramatic escalation in long-running tensions between the two countries.

Israel warns "Tehran will burn" if Iran continues firing missiles, while state media say 60 people have been killed in a strike on Iran's capital.

In response to Israel’s attack, Iran fired back with more than 100 drones. NBC News’ Chief International Correspondent Keir Simmons reports more. Former NATO Supreme Allied Commander retired Gen. Wesley Clark and Senior Fellow at the Carnegie Endowment for International Peace Aaron David Miller join Ana Cabrera to examine the possibility of further attacks.

Israel’s ongoing attacks on Iranian nuclear sites, generals, and scientists killed 78 people and wounded more than 320 on Friday, Iran’s ambassador told the U.N. Security Council, but he said “the overwhelming majority” of victims were civilians. Israel described the new wave of hostilities as the beginning of “Operation Rising Lion.”

Sirens sounded in Israel as Iran launched dozens of ballistic missiles in retaliation for Israel's strikes on its nuclear facilities.

Johnson affirmed the U.S. and Israel's shared goal of preventing Iran from acquiring nuclear weapons. Israeli Prime Minister Benjamin Netanyahu stated the operation aims to counter Iran's threat to Israel's existence.