Relationship of international law and municipal law — Conduct of foreign relations — Relationship between powers of United States courts, Congress and Executive — Power to declare war — Constitution giving Congress the power to declare war — Deployment of United States cruise missiles in the United Kingdom — Whether President entitled to order deployment of missiles without prior Congressional declaration of war — Whether deployment of missiles constituting violation of customary international law and right to life and liberty under Fifth and Ninth Amendments to United States Constitution — Whether deployment raising justiciable question — Political question doctrine

War and armed conflict — Weapons — Nuclear weapons — Legality of nuclear weapons — Deployment of United States cruise missiles in Europe — The law of the United States