Philip Ewing

Philip Ewing is NPR's national security editor. He helps direct coverage of the military, the intelligence community, counterterrorism, veterans and other topics for the radio and online. Ewing joined the network in 2015 from Politico, where he was a Pentagon correspondent and defense editor. Previously he served as managing editor of and before that he covered the U.S. Navy for the Military Times newspapers.

Nations waged campaigns of influence against each other for centuries before Russia's interference in the 2016 U.S. presidential election, and nothing is likely to stop them anytime soon.

Congress could mandate more "disclosure" for foreigners buying ads on U.S. social networks, but that wouldn't stop the ads from being sold, nor would it address the covert part of the Russians' playbook — the cyberattacks, snooping and dumping of embarrassing information.

Updated Oct. 25 at 1:42 p.m. EDT

Twitter has promised more disclosure about its advertisements as members of Congress put the big social networks under a microscope in investigating Russian interference in U.S. politics.

The San Francisco-based microblogging service said Tuesday that it plans to unveil an "industry-leading transparency center" through which it will "offer everyone visibility into who is advertising on Twitter, details behind those ads" and tools through which users can respond.

This week in the Russia investigations: Facebook hits Washington with a P.R. blitz, the imbroglio sucks in more tech giants and the White House weighs how nicely — or rudely — to treat Robert Mueller.

Sandberg leans in to damage control mode

Facebook Chief Operating Officer Sheryl Sandberg is a billionaire titan of Big Tech who looks down on the world from the peak of empire — but she tried to sound as contrite as she could this week in Washington.

Shortly before Election Day last year, some helpful-looking posts began popping up on Twitter: No need to stand in line or even leave home, they said — just vote by text!

The messages, some of which appeared to come from Hillary Clinton's campaign, had versions in Spanish, with gay pride flags and other permutations. They were also 100 percent false.

Where did they come from?

This week in the Russia investigations: A progress report — sort of — from the Senate Intelligence Committee; Robert Mueller meets the author of the dossier; and Donald Trump Jr. may have a date on Capitol Hill.

Russian hackers stole top secret cybertools from a National Security Agency contractor in yet another embarrassing compromise for U.S. spy agencies, the Wall Street Journal reported Thursday.

The NSA contractor is believed to have taken highly sensitive official software home to a personal computer in 2015. His machine was running a Russian security program made by Kaspersky Labs, which can be exploited by Russia's intelligence agencies, the Journal reported.

Updated at 2:17 p.m. ET, Oct. 3

Facebook said on Monday it has given Congress thousands of ads linked with Russian influence operations in the United States and is tightening its policies to make such interference more difficult.

"Many [of the ads] appear to amplify racial and social divisions," it said.

The social media giant confirmed that it discovered the ad sales earlier this year and gave copies to Justice Department special counsel Robert Mueller, who is investigating Russian interference in the 2016 election.

Last week in the Russia investigations: Washington gears up for the leaders of the Senate Intelligence Committee, Twitter gets its turn in the barrel and states learn at last about the extent of last year's attack.

D.C. waits to hear from Burr and Warner

Before we take a look back at the past week in the Russia imbroglio, a look ahead: The chairman and vice chairman of the Senate Intelligence Committee have scheduled a press conference for Wednesday.

The presidential election is long past, but online attacks aimed at shaping the U.S. information environment have kept right on coming.

This week brought a slate of fresh examples of ways in which users — some of them demonstrably Russian, others not — continue to try to use Facebook, Twitter and other platforms to jam a crowbar into existing American political divisions and wrench them further apart.

Last week in the Russia imbroglio: Donald Trump's former campaign chairman, Paul Manafort, got some bad news; members of Congress put social networks, including Facebook and Twitter, under the interrogation lights; and with all these many lawyers now running around — the meter is running too.

Much more below.