[Video below.] President Trump used his Memorial Day address at Arlington National Cemetery on Monday to pay tribute to the 13 American service members killed during the ongoing conflict with Iran, while also reaffirming his vow that Tehran will never obtain nuclear weapons. One grieving military family attended the ceremony as Trump delivered his remarks following a wreath-laying at the Tomb of the Unknown Soldier.

“These incredible men and women gave their lives to ensure that the world’s number one state sponsor of terror will never have a nuclear weapon,” Trump said moments after laying a wreath at the Tomb of the Unknown Soldier.

“Oh, and they won’t. They will never have a nuclear weapon. I’m sure you know that one.”

During the ceremony, Trump recognized the relatives of Air Force Capt. Ariana Savino, the 31-year-old Washington state native who was killed March 12 when a KC-135 Stratotanker refueling aircraft crashed over Iraq. The president asked the crowd to acknowledge the family with applause.

Trump reflected on the military losses sustained in the recent Iran conflict while contrasting them with another operation he described as swift and casualty-free.

“In two wars recently, we’ve lost a total of 13 service members,” he said.

“In Venezuela, which was a complete and total victory … we took that over in one day, lost no one. In Operation Epic Fury, we lost 13 wonderful souls — wonderful, special people.”

The remarks came just days after Trump revealed that the United States and Iran had reached what he described as a “largely negotiated” memorandum of understanding that would reopen the Strait of Hormuz to global maritime traffic, while postponing nuclear-related matters to a later phase of negotiations.

Senior administration officials clarified Sunday that a finalized agreement was still likely several days away. Trump also issued a statement urging caution as negotiations continue.

“Both sides must take their time and get it right. There can be no mistakes!”

Iranian President Masoud Pezeshkian stated Sunday that Tehran was prepared “to assure the world that we are not after a nuclear weapon,” despite years of international concern over Iran’s uranium enrichment activities, which have approached weapons-grade levels.

At the same time, some Republicans on Capitol Hill have expressed concern that Trump could bring the conflict to a close without fully dismantling Iran’s nuclear capabilities, fueling debate inside the party over how the war should end.

The president also turned part of the ceremony into a tribute to America’s World War II heroes, singling out 97-year-old Battle of the Bulge veteran Harry Miller for recognition before the crowd.

“At 15, Harry Miller lied about his age to enlist and was soon fighting to stop the SS Panzer divisions, as part of the famed 740th Tank Battalion,” Trump told his audience.

“The Daredevils, they were called — of which he is among the last surviving members at 97 years old,” the president recounted.

“Within six months after the battle, Harry’s unit lost 42 comrades. He’s remembering them today.”

“Sgt. Miller, it is a true honor to have you with us.”