Concern has been raised that the electrical grid of this nation is vulnerable to prolonged collapse. The postulated mechanisms are geomagnetic storms, electromagnetic pulse attacks (EMP) via a high altitude nuclear detonation, cyberattacks, and kinetic attacks. The likelihood of such events and the consequences to the American public of a protracted electric power failure are reviewed.

中文翻译：

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对美国电网威胁的评估

人们担心该国的电网很容易长期崩溃。推测的机制是地磁风暴，通过高空核爆炸产生的电磁脉冲攻击（EMP），网络攻击和动能攻击。回顾了此类事件的可能性以及长期停电给美国公众带来的后果。