Ukrainian troops are mounting a stiffer-than-expected resistance to Russian forces, fighting with a resourcefulness that could trip up Russian troops for weeks or months to come.
Putin’s reaction to the initial wave of sanctions has provoked a range of concerns that one senior official called the "Cornered Putin Problem.”
A Western intelligence report indicates that Chinese officials had some level of knowledge about Putin’s war plans or intentions.
Declassified information is part of a campaign to complicate what officials say are Russia’s plans to invade Ukraine.
The plan involves staging and filming a fabricated attack by the Ukrainian military either on Russian territory or against Russian-speaking people in eastern Ukraine.
The war game and study by the Center for a New American Security illustrate how dependent the world is on Taiwanese computer chips.
The interim findings of a comprehensive study by the agency have angered victims, who described their release as a "breach of faith."
Russia has attacked Ukraine’s power grid in the past, and experts say Moscow might take similar steps as it masses troops along the border.
The training, approved by the State Department, underscores the perils of military partnerships with repressive governments.
What began as strange symptoms has turned into a diplomatic mystery spanning multiple countries and involving speculation about secret high-tech weapons and attacks.