Ukrainian marines unloading ammunition at a training ground for recruits in the Zaporizhzhia region last July.

In math, the U.S. ranked 28th out of 37 participating countries from the Organization for Economic Cooperation and Development, a group that includes mostly industrialized democracies.

President Xi Jinping has concentrated his power in China by jailing and retiring political rivals and taking greater control of the civil government and the military.

President Biden and China’s leader, Xi Jinping, in the gardens at the Filoli Estate in Woodside, Calif., on Wednesday.

Protesters chained themselves to cars to shut down the westbound lanes of the San Francisco-Oakland Bay Bridge on Thursday.

President Biden’s advisers have hinted at only one concrete agreement expected to emerge from his meeting with President Xi Jinping of China.

Gen. Charles Q. Brown Jr., the chairman of the Joint Chiefs of Staff, said that re-establishing military dialogue between two of the world’s most powerful militaries was a goal of the Biden administration.

President Biden and President Xi Jinping of China last year in Indonesia. They plan to meet again while attending the Asia-Pacific Economic Cooperation summit in San Francisco next week.

A rally in solidarity with Palestinians in the Gaza Strip in Amman, Jordan, on Oct. 27.

The talks later this week in San Francisco between Treasury Secretary Janet Yellen and Vice Premier He Lifeng of China follow Ms. Yellen’s meeting with Mr. He in Beijing in July.

Gov. Gavin Newsom of California, left, met with China’s leader, Xi Jinping, at the Great Hall of the People in Beijing. This photograph was released by the governor’s office.

People from across Iceland gathered in Reykjavík for the one-day strike for gender equality on Tuesday.

Senator Chuck Schumer greeting Xi Jinping, China’s top leader, in Beijing on Monday.