The Latest Breaking News from Pentagon

WASHINGTON — The Defense Department and Microsoft Corp. are investigating an error that exposed at least a terabyte of military emails including personal information and conversations between officials, people familiar with the matter said, an episode that highlighted the security risk of moving sensitive Pentagon data to the cloud.

WASHINGTON — It was envisioned as the centerpiece of a $200 billion program revolutionizing how the U.S. Army would fight. Now it’s languishing in storage in Virginia, a 25-ton symbol of the malaise that lies at the nexus of the Pentagon and the defense industry.

Russia's suspension of its last remaining nuclear weapons treaty with the United States may have dashed any hopes of dragging China to the table to start talking about its own rapidly accelerating nuclear arms programmes.

China has sharply criticized a visit to Taiwan by a senior Pentagon official and reaffirmed sanctions against Lockheed Martin and a unit of Raytheon for supplying military equipment to the self-governing island

Polls show a growing number of Americans feel the United States is giving too much aid to Ukraine. That's helped lead to calls for more scrutiny of how the aid is being used.

A delegation of U.S. lawmakers has met with the head of Taiwan’s legislature as part of a five-day visit to the self-ruled island that comes as U.S.-China relations remain tense after weeks of trading accusations over a spy balloon

Not since a balloon crashed in Roswell, New Mexico have inflatable unmanned craft so dominated the American discourse. Alex Woodward and Andrew Feinberg sum up what we learned this week

Not since a balloon crashed in Roswell, New Mexico have inflatable unmanned craft so dominated the American discourse. Alex Woodward and Andrew Feinberg sum up what we learned this week

Talks come as China becomes increasingly assertive around Taiwan

Not since a balloon crashed in Roswell, New Mexico have inflatable unmanned craft so dominated the American discourse. Alex Woodward and Andrew Feinberg sum up what we learned this week

The Pentagon says the first class of 635 Ukrainian fighters has finished a five-week advanced U.S. training course in Germany on sophisticated combat skills and armored vehicles that will be critical in the coming spring offensive against the Russians