"To Have the Only Option That of Killing 80 Million People is the Height of Immorality"

The nuclear war plans that constitute the Single Integrated Operational Plan have been among the most closely guarded secrets in the U.S. government. The handful of substantive documents on the first SIOP -- SIOP-62 (for fiscal year 1962) -- that have been the source of knowledge about it have been declassified, reclassified, re-released, and then closed again, fortunately not before key items had been copied at the archives.