Greg Myre

When it comes to U.S. national security, one foreign company sets off alarm bells like no other: Huawei, the Chinese telecom giant.

Huawei scored a key victory, and the U.S. suffered a significant setback, when the company received the green light to build up to 35% of Britain's 5G cellular phone network.

The U.S. government says it's on high alert for cyberattacks from foreign countries in this election year. Yet private cybersecurity firms have often been the ones sounding the alarm, and in some cases, they are selling their services to the U.S. intelligence community.

"We've seen Iran impersonating political candidates," said Sandra Joyce, the head of global intelligence at FireEye, a leading cybersecurity company.

Iraq has been dealing with widespread protests for months, but these demonstrations have been directed at the country's weak, faltering government — and not the U.S.

A newly released watchdog report on how the FBI carried out the Russia investigation offers something for everyone.

The report, the work of Justice Department Inspector General Michael Horowitz, found that the FBI had ample evidence to open the investigation into the 2016 Trump campaign and its links to Russia. For Democrats, that was long-awaited vindication.

Republicans seized on the report's sharp criticism of the FBI, which suffered from "serious performance failures" as it pursued surveillance warrants against one of Trump's campaign advisers, Carter Page.

Mike Lofgren is the very definition of a civil servant. He was a congressional staffer for 28 years, with most of that time spent crunching numbers on the Senate and House budget committees.

He's moderate and mild-mannered, saying, "I was on the Republican side my whole career. I wasn't a culture wars Republican, basically a fiscal conservative in the manner of say, [President Dwight] Eisenhower."

Updated on Oct. 2 at 11:45 a.m. ET

In a July 25 conversation with Ukrainian President Volodymyr Zelenskiy, President Trump asked for an investigation of former Vice President Joe Biden and his son Hunter Biden for their activities in Ukraine several years ago.

Nearly three decades after the Cold War ended between the U.S. and the Soviet Union, a new debate is stirring: Is the U.S. heading into a new Cold War, this time with China?

"The Chinese military has undergone a substantial program of modernization to the point now where they are a near-peer military in a number of military domains," Neil Wiley, the director of analysis at the Defense Intelligence Agency, said in an interview with NPR.

When former defense secretary Jim Mattis is asked about his relationship with President Trump, he has an answer ready.

"I don't discuss sitting presidents," Mattis tells NPR in an interview. "I believe that you owe a period of quiet."

The head of the National Security Agency, Army Gen. Paul Nakasone, has a catchphrase: "persistent engagement."

This covers a broad spectrum of cyber activities at the nation's largest spy agency. But at its core, it means relentlessly tracking adversaries, and increasingly, taking offensive action against them.

"That's the idea of persistent engagement. This idea of enabling and acting," Nakasone recently told NPR. When he took over the agency last year, he said that rivals didn't fear the U.S. in the cyber realm, and he intended to change that.

Nearly two decades into the war in Afghanistan, the U.S. suddenly appears to be nearing an agreement with the Taliban that could bring the remaining 14,000 U.S. troops home.

That's causing unease inside the Afghan government, which has been left on the sidelines as the U.S. and the Taliban have held multiple rounds of talks this year in the Gulf nation of Qatar. The latest round wrapped up last week without a deal, but with signs of progress.

Director of National Intelligence Dan Coats, one of the last remaining survivors of President Trump's original national security team, will leave the administration on August 15, the president said in a tweet on Sunday.

The Defense Department wants more Americans to speak Chinese, and it provides millions of dollars to train students at U.S. universities.

China's government, through language centers known as Confucius Institutes, has been doing the same thing, for the same reasons, and at some of the same U.S. universities.

But a new law has forced these American universities to choose: They can take money from the Pentagon or from the Confucius Institute — but not both.

As a young government employee in 1975, Marti Peterson was assigned to the U.S. Embassy in Moscow. She loved the social scene and it earned her a nickname.

"I was known as 'Party Marti' because I was out socializing with the Marine guards, with younger secretaries, the single, social life," Peterson said. "We did drink our share of Carlsberg beer."

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John Walker Lindh, known as the "American Taliban" after his capture in Afghanistan in 2001, was released from prison on Thursday after serving 17 years of a 20-year sentence, the Bureau of Prisons said.

Lindh received three years off for good behavior, though his probation terms include a host of restrictions: He needs permission to go on the Internet; he'll be closely monitored; he's required to receive counseling; and he's not allowed to travel.

At a superhero extravaganza in Washington, comic book fans dressed the part. No matter which way you turned, middle-aged men were in Batman costumes.

Not exactly the place you'd expect a CIA discussion on recruiting foreign spies. And yet CIA staff historian Randy Burkett, wearing khakis and a polo shirt with the CIA logo, was doing exactly that.

The new International Spy Museum doesn't shy away from controversy. One exhibit room has yellow stencil on a stark, cinderblock wall that reads, "What is torture?"

A video features Jose Rodriquez, an ex-CIA official who was deeply involved in the waterboarding program of terror suspects after the 2001 al-Qaida attacks: "This was a very successful program," Rodriguez says. "It protected the homeland and saved American lives."

The FBI is investigating some 850 cases of domestic terrorism and considers it serious and persistent threat, the FBI's Michael McGarrity told the House Committee on Homeland Security on Wednesday.

McGarrity and his fellow national security officials then went on to explain to committee members why the U.S. doesn't have an explicit law allowing the federal government to criminally charge extremists with domestic terrorism.

A Coast Guard officer charged with gun and drug offenses, and also accused of drawing up a hit list of news anchors and Democratic politicians, could be released from pretrial detention if a supervision program can be worked out, a federal judge said Thursday.

Prosecutors describe Lt. Christopher Hasson, 49, as a "domestic terrorist" and believe he intended to carry out a major attack. However, the charges against him are for illegal possession of weapons and drugs, and Hasson has pleaded not guilty.