In terms of catching spies, polygraph tests failed spectacularly in key moments. More on that in a moment. First, consider the second Trump administration, which is leaning in on polygraphs, ...

The Department of Homeland Security is "unapologetic" about using lie-detector tests on staffers as it aims to snuff out "leakers" who feed internal agency information to the public, Fox News Digital ...

Federal agencies have stepped up their efforts over the past few weeks to find potential leakers, and some — like the FBI, the Department of Homeland Security and the Department of Defense — are ...

A version of this story appeared in CNN’s What Matters newsletter. To get it in your inbox, sign up for free here. When President Ronald Reagan’s White House threatened thousands of government ...