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Illustration: Sarah Grillo / Axios

This story is from Codebook, the new Axios cybersecurity newsletter that launched today. Sign up here.

It’s no secret that the internet is a fertile recruiting ground for extremists of all types. But a five-month effort trying to combat extremism shows promise in getting would-be white nationalist and ISIS sympathizers to click away from radical content.

Driving the news: Moonshot CVE, an anti-extremist consultancy, ran ads directed at users searching for propagandist torture videos and using searches like "how to join ISIS" or "kill all the Jews." Working in partnership with the Gen Next Foundation and the Google run incubator Jigsaw, Moonshot was able to divert 1,300 at-risk Google searchers to counter-narratives debunking propaganda or presenting an alternate worldview.

Why it matters: The internet is a major recruitment and organizational tool for extremist groups. Rather than count on websites to police themselves, Moonshot aims to temper extremists' ability to find that content. Based on Moonshot's numbers, there's reason to hope that someone can head would-be extremists off at the pass or even direct them to help, including mental health programs, an option they tested.

The effect: Moonshot’s redirecting strategy worked on 1,300 people out of 56,000 attempts. That's a fairly strong outcome — 20% more effective than the average ad on Google search.

The mental health option: Moonshot also experimented with offering ads for mental health services to those searching for extremist content. It appears to be a viable option. Their targets were 48% more likely to click on an add for psychiatric support than a control group. Those searching for the most violent content clicked on the ad 115% more often.

The big picture: Redirecting a person once does not inherently mean they will be dissuaded from seeking extremist material again. However, many former extremists say that mental health and social work were critical to leave violent movements. But while Moonshot is still tinkering with the content on the other end of their ads, it all means nothing if the ads don't work — which they appear to.

Go deeper

"Atmospheric river" swings Northern California from drought to flood

Satellite view of the bomb cyclone swirling off the coast of the Pacific Northwest and the atmospheric river affecting California on Oct. 24. Photo: CIRA/RAMMB

A series of powerful "atmospheric river" storms are delivering historic amounts of rainfall across parts of drought-stricken California and the Pacific Northwest.

Why it matters: The atmospheric river, packing large amounts of moisture, was causing Northern California to whiplash from drought to flood, as it slowly moved south overnight. It's triggered widespread power outages, flooding and mudslides.

In photos: Drought-ravaged California lashed by major storm

Workers try to divert water into drains as rain pours down on Oct. 24 in Marin City, California. Photo: Justin Sullivan/Getty Images

A major storm system was pummeling Northern California and parts of the Pacific Northwest with heavy rains overnight.

The big picture: "Atmospheric river" storms, associated with a record-strong "bomb cyclone" offshore from the Pacific Northwest, have brought flooding and mudslides to parts of California that were razed by recent wildfires and in severe drought. It's also caused widespread power outages in California and Washington state.

4 hours ago - World

Sudan's military places civilian prime minister under house arrest

Sudanese Prime Minister Abdallah Hamdok during a 2020 news conference in Khartoum, Sudan. Photo: Mahmoud Hjaj/Anadolu Agency via Getty Images

Sudan's civilian Prime Minister Abdalla Hamdok was put under house arrest and several other ministers were also detained Monday in what appears to be a military coup in the country, per local reports.

Why it matters: The arrests of the civilian faction in the Sudanese government came a day after U.S. envoy Jeffrey Feltman met with the head of the military faction of the Sudanese government General Abdul Fattah al-Burhan and warned him against staging a coup.