Assuming a land-based system in which satellites can identify the plume of a nuclear missile launch how long does a US president have to decide whether to launch a retaliatory strike? I’ll provide the answer once the poll closes by responding to this post.
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Per Nuclear War: A SCENARIO by Annie Jacobsen our president would have approximately 6 minutes to decide whether or not to launch a retaliatory nuclear strike and to what degree.
BTW Jacobsen does some deep sourcing for her books.