Russian hackers targeted US nuclear scientists and at least two Department of Energy labs in a sophisticated cyber-espionage campaign in 2022. The hacking campaign, which exploited a previously unknown vulnerability in a commercial VPN software, gave the attackers access to sensitive research and data related to US nuclear weapons. The article notes that the cyberattack highlights the continuing threat posed by nation-state hackers and their ability to exploit vulnerabilities in critical infrastructure. The US government has not officially confirmed the attack, but security experts warn that such breaches are becoming increasingly common and that organizations must take steps to improve their cybersecurity defenses.