“International Law as an Instrument.” The meeting will focus on the distinctive ways international law serves as an instrument that national and international actors invoke and deploy, and by which they are constrained. Programs include “Senate v. President: A Moot Court on Treaty Withdrawal Powers” and “Assessing Professional and Judicial Integrity in International Tribunals.” Honorees and keynote speakers include Justice Stephen G. Breyer of the U.S. Supreme Court; Zeid Ra’ad Al Hussein, former UN High Commissioner for Human Rights; and Judge Abdulqawi Yusuf, President of the International Court of Justice.