On the brink of nuclear war, America’s bold response to the Soviet Union depended on an unknown spy agency operative.

Is Palantir’s crystal ball just smoke and mirrors?

How killing by remote control has changed the way we fight.

How the CIA used a fake science fiction film to sneak six Americans out of revolutionary Iran. The declassified story that became Ben Affleck’s Argo.

The parallel lives of a KGB defector and his CIA handler.

Pete Forde was a good landlord and a great friend, or so his tenants thought. Then they discovered he was filming them in their most private moments.

The attack by Chinese spies reached almost 30 U.S. companies, including Amazon and Apple, by compromising America’s technology supply chain.

The hit on Sergei Skripal.

There the man in the shorts—later identified as a Russian agent using the alias Richard Murphy of New Jersey—handed Michael Zottoli from Seattle two items: a flash memory card and a bag that held $150,000 in cash.

Within nine months they’d both be behind bars.

Did a school for spies get conned by a fake spook who molested students?

The story of William Morgan: American, wanderer, Cuban revolutionary.

Ever since childhood, Brian Regan had been made to feel stupid because of his severe dyslexia. So he thought no one would suspect him of stealing secrets.

The stories of women who “are operating at unprecedented levels on every floor of CIA headquarters and throughout its far-flung global outposts.”

Uncovering Baltimore’s secret aerial surveillance program.

Their entire lives, Alex and Tim Foley thought their mom and dad were typical, boring American parents. Then the FBI showed up.

David Vincenzetti says his company, which sells spyware to world’s law enforcement and intelligence agencies, is helping to thwart terrorism. Others say it’s a danger to citizens, dissidents, and journalists alike.

On applying to work as an undercover agent.

In 2006, Alexander Litvinenko, a former Russian spy working for British intelligence, was poisoned. As he lay dying, he worked with detectives to find his killer.

Who was Ashraf Marwan working for when he fell to his death from the balcony of a London flat?

He was one of Israel’s greatest spies. Then he brought his own country to the brink of war.

You can have a PhD from Yale. You can be a rising star in the State Department. And you can still find yourself being investigated by the FBI for espionage.

NSA-grade spyware is up for sale, and the world’s worst dictatorships are buying.

The N.S.A. claims it needs access to all our phone records. But is that the best way to catch a terrorist?

Catching up with Edward Snowden in Moscow.

The case against Jonathan Pollard, an American who spied for Israel.