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  3. Foreign Relations of the United States, 1964–1968, Volume X, National Security Policy
  4. Document 159

159. Memorandum From President Johnson to His Armed Forces Aide (Cross)1

Washington, December 21, 1966.

Under my responsibility to activate the Emergency Broadcast System, I direct that in the event the Commander in Chief, North American Air Defense Command, declares Air Defense Emergency Red condition, the White House Communications Agency shall be authorized to activate the Emergency Broadcast System and the Office of Civil Defense shall be authorized to follow with the dissemination of appropriate warning messages.

Lyndon B. Johnson
  1. Source: Washington National Records Center, OSD Files: FRC 330 70 A 4443, 384 Civil Defense (Aug-) 1966. No classification marking.↩