Greg Myrie

The U.S.

and Israel bombed Iran's nuclear facilities for 12 days last June.

Trump is not saying what the U.S.

might hit in a future attack.

Greg Myhre, NPR News, Washington.

The traditional playbook is to unleash the Revolutionary Guards to crush the protests.

That worked previously.

It may work again.

But it doesn't address the fundamental grievances on living standards, and that will keep eroding any support the regime might have left.

Iran's supreme leader, Ayatollah al-Khamenei, is 86.

He's been in power 37 years.

He's been good at holding power, but he's failed to meet the day-to-day needs of Iranians.

Yeah, President Trump said Iran is starting to cross his red lines, but he did not say exactly what they're looking at.

But he and his administration say they are weighing several different possibilities, including military and non-military options.

And he said after making earlier threats that the leaders of Iran reached out actually over the weekend and want to negotiate.

Now, his team is working on a meeting, but he also said they might have to act sooner if this violence that Greg is talking about continues.

Trump's expected to meet with his national security team tomorrow about Iran.

Iran actually has responded as well, warning that U.S.

bases could be considered a legitimate target if the U.S.

goes through with the strike.