Jurisdiction — In general — Territorial — Exemptions from and restrictions upon territorial jurisdiction — Foreign States — State-owned corporations — Amenability to suit in United States courts — Whether jury trial available — Interpretation of Foreign Sovereign Immunities Act 1976 — Whether Act the sole basis for jurisdiction over such corporations — Whether denial of jury trial a contravention of Seventh Amendment to United States Constitution — Whether Act codified a pre-existing cause of action at common law — The law of the United States