The Iranian-backed militia said it had targeted a refinery in Riyadh belonging to Saudi Arabia’s state-owned oil company as fresh airstrikes hit Yemen’s capital.

President Trump’s speech at the U.N. General Assembly amounted to a rejection of the founding concept of the United Nations.

Nearly every category of product costs more than it would have had prepandemic trends continued. And many product prices are still rising faster than they were before.

Gen. Christopher T. Donahue’s vision for fighting future wars won him powerful supporters around the world. Could they save his career?

A lone signal from an experiment in South Dakota doesn’t fit the profile of any other known particles, physicists say.