The fighting between India and Pakistan intensified sharply on Saturday with both sides targeting air bases and blaming each other for striking first, as the United States again called on both sides to de-escalate.

Pakistan said India had targeted at least three of its air bases with air-to-surface missiles in the early hours of Saturday, including Nur Khan, a key air force installation near the capital, Islamabad. Witnesses in the city of Rawalpindi, where Nur Khan is located, reported hearing at least three loud explosions, with one describing a “large fireball” visible from miles away.

Within hours, Pakistan said it had retaliated using short-range surface-to-surface missiles against several locations in India, including the Udhampur and Pathankot air bases and a missile storage facility. “An eye for an eye,” the Pakistani military said in a statement.

India, however, also described its action on Saturday as retaliation. The Indian military said it had struck several Pakistani military targets, two of them radar sites, in response to a wave of Pakistani attacks on 26 locations using drones, long-range weapons and fighter planes. There was “limited damage” to equipment and personnel at four Indian air force bases, Vyomika Singh, an Indian Air Force officer, said at a news conference on Saturday.

“It is Pakistani actions that have constituted provocation and escalation,” said India’s foreign secretary, Vikram Misri. “In response, India has defended and reacted in a responsible and measured fashion.”

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In the fall of 2024, the cardinal who is now Pope Leo XIV sat at a large round table inside the Vatican, discussing the challenges that face the Roman Catholic Church with a cardinal from Ethiopia, archbishops from Cameroon and Kenya, a cardinal posted to Mongolia, and bishops from Texas and Liberia.

Joining them at the table were a Catholic podcaster from Dallas; a business consultant from Melbourne, Australia; a university administrator from Fiji; and a parishioner from Myanmar, three of whom were women.

Each person at the table, clergy or layperson, was allowed three minutes of uninterrupted speech.

“Every voice had equal value,” said Susan Pascoe, the business consultant, who is chair of Catholic Emergency Relief Australia. She sat at a table with the future pope for the meetings, which often stretched to 11 hours or more a day during four weeks in Rome.

Pope Francis dropped by to listen in, leading another meeting attendee, Wyatt Olivas, a college student from Wyoming, to refer to the pontiff as his “bestie in Christ.”

When Pope Leo XIV stepped out onto the balcony of St. Peter’s Basilica on Thursday and gave his first address as pontiff, he indicated that he would continue this practice of listening closely to many voices.

He called for a “synodal church,” referencing the process of dialogue between church leaders and lay people that was one of Pope Francis’s signature legacies.

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He hugged a North Korean general. He squired China’s leader around with special care. He spoke of the sacrifices of soldiers. And he paraded Russian-made drones for the first time across Red Square.

President Vladimir V. Putin of Russia drew attention to the very factors that have enabled him to wage war against Ukraine into a fourth year, as he presided over festivities on Friday in Moscow to commemorate the 80th anniversary of Soviet victory over the Nazis during World War II.

Mr. Putin’s full-scale invasion of Ukraine in 2022 initially proved catastrophic for Russian forces, but he has since turned around the situation on the battlefield. Among his helpers: North Korean soldiers and ammunition, Chinese oil purchases and technology, Russian soldiers shouldering immense losses and seemingly unending swarms of Russian drones.

All were represented on Red Square in some way, as the Russian leader underscored to the world, through a Soviet-style display of pageantry and militarism, that he does not need to stand down in Ukraine.

“Truth and justice are on our side,” Mr. Putin told the more than 11,500 military personnel that the Kremlin said had gathered for the parade, including over 1,500 involved in Moscow’s war against Ukraine.

“The whole country, society and people support the participants of the special military operation,” Mr. Putin added, using the Kremlin’s chosen euphemism for the war.

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The leaders of Britain, France, Germany and Poland arrived together in Kyiv on Saturday for their first-ever joint visit to Ukraine, pledging to intensify pressure on Russia until it agreed to a full, unconditional 30-day cease-fire.

Ukraine’s foreign minister, Andrii Sybiha, released a photograph of President Volodymyr Zelensky and the four other European leaders huddled around a phone as, Mr. Sybiha said, they spoke with President Trump.

“Ukraine and all allies are ready for a full unconditional ceasefire on land, air, and at sea for at least 30 days starting already on Monday,” Mr. Sybiha wrote on social media. “If Russia agrees and effective monitoring is ensured, a durable ceasefire and confidence-building measures can pave the way to peace negotiations.”

The visit was intended to underscore Europe’s enduring commitment to Ukraine’s defense and sovereignty after more than three years of war with Russia. It came one day after Russia’s celebration of the 80th anniversary of the end of World War II, during which President Vladimir V. Putin welcomed President Xi Jinping of China and other foreign dignitaries to Moscow for a military parade meant to project Russia’s power and Mr. Putin’s bid to reshape the global order on his terms.

The two events crystallized both the changing contours of the war in Ukraine and the broader geopolitical shift underway since Mr. Trump entered office. In just a few months, Mr. Trump has reversed core tenets of U.S. foreign policy, and is presiding over the weakening of the trans-Atlantic bond that helped set Europe on the path to peace after the cataclysm of World War II.

At the moment, Ukraine is caught between an emboldened Russia, buoyed by China, North Korea and Iran; and a Europe scrambling to fill the void left by the United States.

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Since President Trump took office vowing to pull back U.S. support for Ukraine, European leaders have worried that they would be unable to supply Ukraine with the weapons it needs.

So far, it looks like they were right.

The so-called coalition of the willing of European nations backing Ukraine has struggled to get materiel to its battlefields in the time since Mr. Trump made clear that Europe needed to shoulder more of the load for Ukraine’s security and its own.

That is one reason Ukraine’s Parliament overwhelmingly approved on Thursday a deal to give the United States a share of future revenue over natural resources, including minerals. While short of a security guarantee, it keeps open the possibility of continued shipments of American arms and other military assistance.

“This gives us hope,” said Yehor Chernev, the deputy chair of the Ukrainian parliament’s committee on national security, defense and intelligence.

In an interview shortly after the vote, Mr. Chernev said Ukrainian forces were running low on long-range missiles, artillery and, above all, ballistic air-defense systems — the majority of which are manufactured in the United States, according to an analysis by the Kiel Institute for the World Economy.

By summer, military aid approved under the Biden administration will run out, and Mr. Trump appears reluctant to renew it.

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Most American burgers are, in fact, not entirely American.

The patties grilled at backyard barbecues or flipped in fast-food restaurants are often a blend of ground beef, both homegrown and imported from other countries, especially Brazil. In school cafeterias and home kitchens, this global mix of beef is seared, fried and sizzled into millions of tacos, meatballs and lasagnas every day.

Now, President Trump’s dismantling of the global trading system through his imposition of broad-based tariffs is leading to shifts in commerce that could make winners out of countries like Brazil that produce commodities the world covets.

When it comes to beef — crucial to satisfying Americans’ hunger for cheap cuts of meat — tariffs will make Brazilian beef more expensive.

But at the same time, Brazil is suddenly a more appealing source for China, another enormous consumer of beef, because its trade war with the United States — and the high tariffs the two nations have imposed on each other — has left China looking for other countries with ample supplies of inexpensive meat.

While U.S. meatpackers, most likely anticipating escalating prices, have been stocking up on Brazilian beef in recent weeks, according to trade data, Brazilian beef exports to China also increased in April.