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Live from NPR News in Washington, I'm Jack Spear.

President Trump has remained unclear about whether or not the U.S. will directly enter the

conflict between Israel and Iran.

Here's what he told reporters today.

I may do it. I may not do it. I mean, nobody knows what I'm going to do.

But as NPR's Kat Lonsdorf reports, the U.S. has what could be a game changer in the conflict,

a 30,000-pound bunker bomb capable of reaching even Iran's most well-protected nuclear facility.

The most fortified nuclear facility

in Iran is called Fordo, located deep inside a mountain. And the U.S. has the only bomb that could

damage it. Because of its size, that 30,000 pound bomb can only be carried by a B-2 stealth bomber,

also something only the U.S. has. Munitions experts tell NPR it might take several repeated hits to get deep enough to reach the facility.

Even still, experts say it would likely only set Iran's nuclear program back, not stop it entirely,

which is what both Israel and the U.S. have said is the goal.

The International Atomic Energy Agency has warned such an attack could cause radioactive contamination.

Kat Lonsdorf, NPR News, Washington.

Environmental groups are challenging a Trump administration order to keep a Michigan coal-fired power plant operating this summer.

NPR's Jeff Brady reports the plant near Grand Rapids was slated to shut down at the end of last month.

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