The Latest Breaking News from National Security

The leak of highly classified Pentagon documents has forced defence officials into the online worlds of gamers, meme lords and their leagues of followers, and exposed an unavoidable weakness in US national security.

Jack Smith's team is asking witnesses if Trump showed off a map containing sensitive national security info

The worst US national security breach in years could help Moscow – and prompt friction with Washington’s allies

Classified Pentagon documents leaked last week paint a grim picture of the trajectory of the war in Ukraine. While it may well be the most significant national security breach since the Snowden leaks of US National Security Agency material a decade ago, the fact that the leak occurred is almost…

White House National Security Advisor Jake Sullivan recently phoned Saudi Arabia’s Crown Prince Mohammed bin Salman, while senior Republican senator Lindsey Graham visited him, highlighting a growing bipartisan interest in strengthening the historical ties between the US and the Kingdom. Recent interactions between senior Saudi leaders and both Democratic and…

The person who leaked U.S. classified documents prompting a national security investigation is a gun enthusiast in his 20s who worked on a military base, the Washington Post reported on Wednesday, citing fellow members of an online chat group.

US National Security Advisor Jake Sullivan praised the peace efforts and offered ‘full US support for those efforts’.

With government concerns over national security growing, Beijing’s influence over platforms such as WeChat and Shein could come under scrutiny

(Corrects to restore dropped word 'after' in paragraph 3)

White House national security adviser Jake Sullivan spoke by phone with Saudi Arabian Crown Prince Mohammed bin Salman on Tuesday amid signs that the Saudis and Iran-allied Houthis in Yemen are making “significant progress” toward finding a permanent end to their nine-year conflict

Anne Keast-Butler, who has spent 30 years in national security, will take over as head of the British listening station in Cheltenham, Glos, next month