Europe Prepares for a Nightmare Scenario: The U.S. Blocking Access to Tech

DAVOS, Switzerland—Rising tensions with the U.S. are spurring new plans in Europe to do something that has long seemed impossible: break with American technology in favor of homegrown alternatives.

President Trump this week dropped his threat to take control of Greenland by force if necessary. But even the possibility of armed conflict with allies has injected new urgency into long-simmering debates in Europe about how to reduce its reliance on U.S. tech infrastructure and tools that support swaths of the economy.