美媒爆：美国家核安全管理局负责人发布紧急备忘录，警告机密信息泄露问题

Core Insights - The head of the U.S. National Nuclear Security Administration, Brandon Williams, issued an urgent memo on October 22, warning staff to enhance measures against the leakage of classified information [1][3] - The memo highlights past violations within relevant departments, indicating a range of severity from minor to major issues [1][3] Group 1 - The memo was marked "urgent" and was sent to leaders of U.S. nuclear weapon laboratories and affiliated facilities, indicating a serious tone and widespread distribution [3] - Williams stated that past behaviors of personnel have "undermined national leadership's confidence" in the ability to protect classified and sensitive non-classified information [3] - The memo appears to focus on institutional flaws and errors within the U.S. nuclear weapons system rather than media leaks [3] Group 2 - One recipient of the memo is the head of a large facility in Kansas City responsible for manufacturing core components of U.S. nuclear warheads, which has previously leaked classified information in three separate incidents [3] - Another recipient is the director of the Los Alamos National Laboratory, a key site for nuclear weapon design, which also experienced security breaches last year [3] - The National Nuclear Security Administration has not yet commented on the memo or the associated security concerns [4]