It's almost three days into the U.S. and Israel's massive military action against Iran.

With 2,000 targets hit since the strikes began.

So far, more than 550 Iranians have been killed, according to the humanitarian organization, the Red Crescent.

And Iran has hit back with force.

Here's our colleague Suna Rasmussen.

Almost immediately after the attacks started over the weekend, we saw Iran responding by attacking Arab countries

in the Gulf. In fact, they've attacked every single country in the Gulf.

And many others in Israel took cover as air raid sirens rang out after Tehran vowed revenge

for the killing of its supreme leader.

Explosions have so far been reported across several U.S. air bases in the region, including

in Bahrain, Jordan, and the United Arab Emirates.

Several deaths have been reported after those Iranian strikes, including in Israel and the

United Arab Emirates.

And I think that's to show both the U.S., Israel, the world, and to show the neighbors in the

Middle East that if Iran is attacked, they want to show the countries in the region that they

can't attack Iran without ramifications.

If there's long-term, full-blown war in Iran, that's obviously very dangerous for the Iranian people.

And if things escalate and Iranians rise up and then there is an increased risk for the Islamic Republic of being toppled.

Right now the Iranian regime is fighting for its survival. an increased risk for the Islamic Republic of being toppled.

Right now, the Iranian regime is fighting for its survival.

The U.S. and Israel just killed the Supreme Leader and dozens of his military commanders,

and the regime is genuinely at risk of falling.

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