Viktor Orban at an European Union summit meeting in Brussels, in March.

A liquefied natural gas terminal in Germany. Most of that L.N.G. comes from the United States, underscoring Europe’s vulnerability to American supplies.

Damage to an apartment building in Kyiv, Ukraine’s capital, after a strike on Friday.

Víctor Feliu at his chocolate company in Mexico. The changing rules for sending goods to the United States have forced him to pause his U.S. shipments.

Secretary of State Marco Rubio, center, during talks in Geneva on Sunday with Ukrainian officials on a plan to end the war with Russia.

President Cyril Ramaphosa of South Africa at the opening plenary session of the G20 summit on Saturday.

President Vladimir V. Putin in a photograph released by Russian state media. Mr. Putin said any Western “theft” of reserves would accelerate the development of alternative payment systems.

A German soldier demonstrating a drone jammer on Friday. If Europe builds a “drone wall,” it will be not a physical barrier but a network of trackers.

The BYD Explorer No. 1, carrying 5,000 electric cars, at a stop in Singapore last year on its way to the Netherlands.

President Trump with Mark Rutte, the NATO secretary general, left, at the White House on Monday.

Firefighters in Odesa, Ukraine, this month after a Russian strike. President Trump warned Moscow that he would impose new economic punishments if it did not agree to a peace deal within 50 days.

A large-scale NATO military exercise involving nine allied nations, earlier this year.

President Trump, together with Pete Hegseth, secretary of defense, and Marco Rubio, secretary of state, during a new conference during the NATO summit in The Hague, on Wednesday.

President Emmanuel Macron of France, speaking in Singapore on Friday.