The European Union's executive on Wednesday warned that it would take action against any “unjustified measures” after the U.S. State Department barred five Europeans it accuses of pressuring U.S. technology firms to censor or suppress American viewpoints. The Europeans were characterized by U.S. Secretary of State Marco Rubio as “radical” activists and “weaponized” nongovernmental organizations. Breton, a businessman and former French finance minister, clashed last year on social media with tech billionaire Elon Musk over broadcasting an online interview with Donald Trump in the months leading up to the U.S. election.