Open-government advocates say that Vice President Cheney is to executive branch secrecy what darkness is to the night. In 2001, Cheney famously refused to disclose the names of oil company executives and others who attended meetings of a White House energy task force that he headed, which helped draft a national energy policy. More recently, a government watchdog group has called attention to less noticed records that Cheney has sought to keep private: travel costs.

http://www.truthout.org/docs_2005/112905R.shtml