Russia’s moves to mobilize thousands more troops and to annex more of Ukraine’s territory signal a new, potentially more dangerous phase of the war.

COVID-19 is contributing to a dramatic decline in the average lifespan of Americans. The drop-off is canceling out decades of public health gains and stretching the gap between the United States and …

Targeted operations by U.S. forces have eliminated notorious leaders of armed extremist groups, al-Qaeda’s Ayman al-Zawahiri the latest among them. But how much they disrupt these terrorist organizat…

The Madrid summit paved the way for Finland and Sweden to join and underscored that Russia is NATO’s chief security threat. But the alliance’s new defensive efforts aren’t likely to change Putin’s st…

Iran is facing international pressure over its nuclear program and assassinations of top officials. Meanwhile, its move to lift subsidies could stir public revolt.