U.S. Worked with Estonia Before Election to Thwart Russian Hackers

The United States deployed operatives to Estonia in the weeks before the November election to learn more about defending against Russian hackers as part of a broader effort to hunt down foreign cyberattacks, American and Estonian officials said. Estonian officials believe the growing cooperation with the United States will be an important deterrent to any attacks by neighboring Russia, while American officials have used the collaboration to help bolster their election defenses.