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President Donald Trump said Monday that any agreement with Iran should include a requirement for several additional countries, including Saudi Arabia and Turkey, to join the Abraham Accords, the U.S.-brokered agreements aimed at normalizing relations with Israel that were forged during Trump's first term. to.pbs.org/42X43mJ

A damaged chemical tank in Southern California cracked over the weekend, which authorities were hopeful would relieve pressure and reduce the risk of an explosion. Some 50,000 residents in Garden Grove have been evacuated and are waiting for a resolution. to.pbs.org/4nPA1Lk

ESPN NFL analyst and recent "Celebrity Jeopardy! All-Stars” winner Mina Kimes is taking over as host of the Scripps National Spelling Bee this year. Nearly 250 spellers will compete for the trophy and more than $50,000 in case and prizes in the annual competition, which takes place from May 26 to 28 in Washington, D.C. Kimes sat down with PBS News Hour co-anchor Amna Nawaz for few quick questions, including on her own childhood spelling bee wins and her advice for students competing today.

The United States and Iran appear to be closing in on a deal to end the war and open the Strait of Hormuz. President Donald Trump said Monday that negotiations are "proceeding nicely," while reiterating his warning that fighting would resume if no deal is reached. to.pbs.org/3PX7gzI

In the final days of World War II, U.S. Army Sgt. Harrison Wright was stationed in a small Belgian village near the German border. He tells his grandson, Sean Guess, about a special assignment in this animated feature from our partners at StoryCorps. (from 2023) to.pbs.org/42b9taS

The annual Hajj pilgrimage, one of the Five Pillars of Islam, officially began Monday. More than 1.5 million pilgrims have arrived in Saudi Arabia from outside the country, Saleh bin Saad Al-Murabba, commander of the Hajj passport forces, said Friday. to.pbs.org/4nPzWau

"Here rests in honored glory an American soldier known but to God." For more than a century, the Tomb of the Unknown Soldier has been a hallowed space among hallowed spaces inside Arlington National Cemetery outside Washington, D.C. For most of that time, sentinels from the 3rd U.S. Infantry Regiment, also known as the "Old Guard," have guarded the tomb 24 hours a day, 365 days a year, rain or shine. The Old Guard's meticulous routine includes pacing back and forth in front of the tomb, taking 21 steps north and south, and standing for periods of 21 seconds at either side. The number 21 symbolizes the 21-gun salute, the highest ceremonial honor for veterans and members of the military. Guards are either relieved every hour or half-hour, depending on the time of year, in an elaborate ceremony called the Changing of the Guard. In May 2015, PBS News producer Justin Scuiletti shot and produced this video, showing a complete Changing of the Guard ceremony edited together from three different ceremonies on the same day.

Memorial Day is supposed to be about mourning the nation's fallen service members, but it's come to anchor the unofficial start of summer and a long weekend of discounts on anything from mattresses to lawn mowers. (from 2023) to.pbs.org/3oqxcpS

In his first encyclical, Pope Leo XIV called for artificial intelligence “to be disarmed,” a word choice he called “strong” but “deliberately chosen.” “This moment needs words capable of attracting attention,” Leo said. Leo’s first encyclical, “Magnifica Humanitas,” has been highly anticipated since early in his papacy, when he declared AI the biggest challenge facing humanity. An encyclical in Catholicism is a letter written by the pope to the church, often detailing matters of morality and social issues. Leo noted that artificial intelligence is dramatically changing how war is waged, citing autonomous weapons systems operating “beyond human reach.” He also mentioned algorithms that can block access to healthcare and employment. “Let’s not fear artificial intelligence but constantly keep the question of the human in play. We cannot be careless with our most powerful technical instruments," he said.

President Donald Trump will participate in a wreath laying ceremony and deliver remarks at Arlington National Cemetery on Monday as part of a Memorial Day observance. to.pbs.org/4v343NP

Acclaimed author Soman Chainani discusses how to engage young people in both reading and the political process. to.pbs.org/4tVP4EH

Pope Leo XIV called Monday for robust regulation of artificial intelligence and for its developers to work for the common good rather than profit, issuing a sweeping manifesto on safeguarding humankind as the technology impacts everything from work to war. to.pbs.org/3PWI5xf

WATCH: Trump participates in Memorial Day observance at Arlington National Cemetery twitter.com/i/broadcasts/1…

For the 3 million women who have served in the U.S. military, there's a growing effort to highlight and register their place in history. Going back to the American Revolution, they have held a variety of roles, and are now the fastest-growing group of veterans. (from 2018) to.pbs.org/39F9ePI

A developing El Nino that is forecast to get quite strong will likely dampen the upcoming Atlantic hurricane season, but it won't make the potentially deadly storms disappear, federal and outside meteorologists predict. to.pbs.org/3RjfYZz

Once a year, large numbers of Muslim pilgrims converge in Saudi Arabia, uniting in religious rituals and acts of worship as they perform the Hajj. The Hajj occurs once a year during the lunar month of Dhul-Hijja, the 12th and final month of the Islamic calendar year. This year, the Hajj will officially start on Monday. to.pbs.org/3Rl09BD

Have you had a high veterinary bill recently? We want to hear from you for an upcoming story: bit.ly/42OV2Mt

North America's bee populations are in trouble, but don't blame the honey bees. While some people argue that an overabundance of managed honey bees – those raised to help pollinate crops and produce honey – is causing native bees to disappear, the evidence doesn't support the claim. (via @ConversationUS) to.pbs.org/4tIEZew

Especially in California, New Mexico, New York, Oklahoma and Washington state — places with dozens of tribally owned stations, including some in busy travel corridors — tribes exempt from state fuel taxes can sell for much less than competing stations nearby. to.pbs.org/4mkJU2I

Top nutrition experts question the protein push, saying Americans already consume more protein than they need, and there's no new evidence that people need to drastically ramp up consumption. to.pbs.org/49xi92c