How a Pro-Palestinian Group Fell Foul of a Long Unused U.K. Terrorism Law

The protest group Palestine Action does not promote violence against people. But after it damaged military property, the British government banned it as a terrorist organization.

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Chinese Officers Questioned U.S. Government Employee About His Army Service

The man, a U.S. citizen, is barred from leaving China by the Ministry of State Security, the country’s main intelligence and counterintelligence agency.

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James Comey Tracked by Secret Service After Post Critical of Trump

After the former F.B.I. director put a picture on Instagram of seashells arranged to say “86 47,” law enforcement tailed his car and tracked his cellphone, steps usually reserved for serious threats.

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Trump Administration Accuses 2 Chinese Citizens of Spying on U.S. Navy

The charges come as the Trump administration tries to aggressively confront China on a host of issues, including national security, trade and immigration.

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Lawmakers Demand Palantir Provide Information About U.S. Contracts

Ten Democratic lawmakers sent a letter to the tech company this week asking about its expanding contracts under the Trump administration.

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How Russian Spies Are Analyzing Data From China’s WeChat App

Moscow has long been suspicious of foreign messaging apps. WeChat’s weak encryption makes it vulnerable.

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Trump Administration Ends ‘Quiet Skies’ Traveler Surveillance Program

The program had briefly ensnared Tulsi Gabbard, the former Democratic congresswoman and now President Trump’s director of national intelligence, who has vocally criticized it as politicized.

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F.B.I. Closes Unit That Policed Compliance With Surveillance Rules

The office audited the bureau’s use of a disputed warrantless wiretap law that is set to expire next spring unless Congress reauthorizes it.

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Three Iranians Accused of Targeting People in the U.K.

The charges against the men come as concerns have grown about Iranian operatives carrying out operations against British residents and citizens.

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