9/11 Commission Executive Director Philip Zelikow telephones a CIA analyst who co-wrote a Presidential Daily Briefing (PDB) item entitled “Bin Laden Determined to Strike in US.” President George Bush received the briefing in August 2001 (see August 6, 2001). The tone of the conversation will be disputed. According to an anonymous Commission staffer who overhears part of the conversation and who talks to author Philip Shenon, Zelikow pressures the analyst to accept the version of the PDB offered by Bush and National Security Adviser Condoleezza Rice, and say that it contained historical information and was written in response to a request by President Bush for such briefing. Zelikow is close to Rice (see January 3, 2001) and defends her interests on the Commission (see May-June 2004). However, Zelikow will later deny pressuring the analyst, saying he was merely trying to prepare a summary of what was known about the PDB for the commissioners and that he had little time, so the interview was conducted by telephone. Nevertheless, the call is in violation of several internal Commission rules, including the requirement that significant interviews be conducted in the presence of at least two staff members. Shenon will describe the call as “a private inquiry into the origins of what was, without doubt, the most controversial document in the investigation.” [Shenon, 2008, pp. 374-376] Zelikow will try to stop one of the commissioners, Richard Ben-Veniste, from talking to the analyst and a colleague (see Early July 2004).