I first came to know John Jackson in his role as a consultant to the international trade group at Arnold & Porter. Fresh out of law school and a novice in the field of international trade law, I quickly learned that John was the leading American expert on legal aspects of both GATT and domestic trade law issues. Only later did I come to realize that his stature in this regard was global. John's advice on GATT issues was sought after by academics and policymakers everywhere.