State immunity — Jurisdictional immunity — Violations of international law — Whether foreign State entitled to immunity for acts contrary to international law — Foreign Sovereign Immunities Act 1976

Relationship of international law and municipal law — Customary international law — Enforcement by municipal courts — Alien Tort Statute 1789

War and armed conflict — Neutrality — Naval warfare — Attack on neutral ship on high seas — Absence of reasonable cause for suspicion — No attempt to investigate ship before attack — Ship outside exclusion zones established by parties to conflict — Whether attack violating international law

Sea — High seas — Freedom of passage — Neutral ship on high seas during armed conflict — Whether attack on ship contrary to international law — The law of the United States