Responses to an article in the “At the Brink” series, raising doubts about a huge overhaul of U.S. nuclear capacity.

The Pentagon needs what the company offers to compete with China even as it frets over its potential for dominance and the billionaire’s global interests.

If he gives Ukraine the capability of striking deep into Russian territory, that decision would be hard for a new president to undo.

Two veterans of Trump’s term look ahead to a potential second term and what it would mean for the world.

Pentagon officials discuss whether the flow of assistance could be hurting the military’s ability to respond to a new conflict.

The ballistic missile launch is a sign of the commitment of Xi Jinping, China’s leader, to continue strengthening the country’s Rocket Force and to project power in Asia.

In a classified document approved in March, the president ordered U.S. forces to prepare for possible coordinated nuclear confrontations with Russia, China and North Korea.