https://apnews.com/c554ea59bd0b4e22bd97eda840dd74e7

PARIS (AP) — On the morning of March 19, 2016, Den Katenberg ran a little test with big stakes.

The previous week, Katenberg's hacking crew had been bombarding the Hillary Clinton campaign's email accounts with fake Google warnings, trying to get her Brooklyn-based staff to panic, enter their passwords and open their digital lives to Russia's intelligence services.