Odaily News Jen Easterly, director of the U.S. Cybersecurity and Infrastructure Security Agency, said that the threat environment has become more complex, and targeted attacks such as ransomware and DDoS attacks have become more common. She is particularly concerned about the real physical threats faced by U.S. election officials and their families, and works closely with intelligence agencies and the FBI to regularly provide the public with updates on these threats. (Jin Shi)