This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
National Security Action Memorandum No. High Yield Nuclear Weapons NARA . Scope and content Memorandum for Secretary of Defense Chairman Atomic Energy Commission concerning problem of developing high yield nuclear weapon General notes Local identifier President Kennedy Office of the Special Assistant to the President for National