Sovereign immunity — State-owned corporations — Foreign Sovereign Immunities Act 1976 — Personal jurisdiction — Commercial activity — Requirement of connection between commercial activity and United States — Contact between foreign State and foreign corporation — Whether fact that letter of credit is payable through New York bank a sufficient connection — Waiver of immunity — Whether agreement to submit dispute to arbitration in Paris a waiver of immunity before United States courts — Subject matter jurisdiction — Whether Federal courts have subject matter jurisdiction in case between foreigners — The law of the United States