In his opening remarks at a conference on contemporary political history organized by the Miller Center of Public Affairs at the University of Virginia, future 9/11 Commission Executive Director Philip Zelikow emphasizes that the public understanding of history is shaped by what are sometimes referred to as “public myths.” “[U]nderstanding contemporary political history is extremely important and constantly alive in public discourse. ‘Contemporary’ is defined functionally by those critical people and events that go into forming the public’s presumptions about its immediate past. This idea of ‘public presumption’ is akin to William McNeill’s notion of ‘public myth’ but without the negative implication sometimes invoked by the word ‘myth.’ Such presumptions are beliefs (1) thought to be true (although not necessarily known to be true with certainty), and (2) shared in common within the relevant political community. The sources for such presumptions are both personal (from direct experience) and vicarious (from books, movies, and myths).” Zelikow says that public assumptions often grow out of “searing events”: “particularly ‘searing’ or ‘molding’ events take on ‘transcendent’ importance and, therefore, retain their power even as the experiencing generation passes from the scene.” [Zelikow, 1999 ] In a previous publication, Zelikow had written about how a “catastrophic terrorism” event could constitute a momentous, history-shaping milestone: “An act of catastrophic terrorism that killed thousands or tens of thousands of people… would be a watershed event in America’s history.… Like Pearl Harbor, such an event would divide our past and future into a ‘before’ and ‘after’” (see November 1997-August 1998).