Nuclear War by Annie Jacobsen

The first rule of nuclear war is that there are no rules. Up to now, no one outside of official circles has known exactly what would happen if a rogue state launched a nuclear missile at the Pentagon. Second by second and minute by minute, these are the real-life protocols that choreograph the end of civilisation as we know it. If a single nuclear missile is launched, it provokes two dozen in return. Frantic calls over secure lines work to confirm the worst as armoured helicopters are scrambled outside. Decisions over hundreds of millions of lives need to be made within six minutes, based on partial information, knowing that once launched, nothing is capable of halting the destruction. Because the plans for General Nuclear War are among the most classified secrets held by the United States government, this book takes the reader up to the razor's edge of what can legally be known.