President Trump promises to respond after Iran shot down a U.S. helicopter. The lead starts right now.

The U.S. Army Apache helicopter shut down. Trump says it was Iran and says the U.S. must respond.

Is this the start of yet another major escalation with a ceasefire being discussed?

Is the ceasefire on the verge of collapse?

CNN is live at the White House.

CNN is also live in Iran.

Plus, a deciding moment for Democrats in Maine.

Are they willing to put Graham Platner's scandals aside and have him take on Republican Senator Susan Collins, but that's not

the only big race we're watching on this primary day, and the clock tick tick ticking down to Sunday's

UFC fight at the White House, and the deadline tonight in a lawsuit trying to stop the big event

and remove the claw.

This is CNN Breaking News.

Welcome to the lead. I'm Jake Tapper. We begin with breaking news in our world lead. The U.S. war with Iran is very much not over.

This afternoon on Truth Social, President Trump posted, quote,

I have just been informed by our great military that last night the Iranian shot down

one of our highly sophisticated Apache helicopters while patrolling over the state of Hormuz.

There were two pilots involved, both are safe and uninjured.

Nevertheless, the United States must of necessity respond to this attack.

This attack coming during a ceasefire that has not exactly seen a ceasing of fire.

Two officials in the U.S. said it was an Iranian drone that brought down the Army helicopter off the coast of Oman.

A separate source telling CNN that an Iranian Shahed

drone struck the U.S. helicopter. The two crew members were rescued by an uncrewed drone boat,

...