Russian counterintelligence agents are analyzing data from the popular Chinese messaging and social media app WeChat to monitor people who might be in contact with Chinese spies, according to a ...

Following the successful “Operation Spider’s Web” drone strike on Russian bomber bases, Ukraine’s future military strategy ...

Mr. Putin has courted Mr. Xi for years, in more than 40 personal meetings, and has cemented a far deeper partnership with ...

The document indicates that the Russian domestic security agency, known as the F.S.B., pulls purloined data into an ...

In 1968, the feds thought that the boxing champion—and future grill salesman—could be a potent weapon against the left.

How can anyone be so careless with the nation’s security? That is the question everyone is asking after reports surfaced last week that President Trump’s national security leaders discussed ...

The Pentagon will subject staffers to lie detector tests to weed out anyone leaking to the media. The Department of Defense said it plans to use polygraph tests in a memo published on Friday.

In fact, those efforts create major threats to US national security. Some of its activities constitute a counterintelligence disaster in the making. There are at least two ways in which Musk’s ...

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Lathrop, who wrote under a pseudonym, was making a point about counterintelligence—the flushing out of enemy spies and leakers who might compromise a spy agency’s precious secrets ...

The FBI’s Persian-language wanted poster for Ahmad Khazai, Iran’s former counterintelligence deputy in its Ministry of Intelligence. The Federal Bureau of Investigation (FBI) recently issued “seeking ...