During the runup to the 2003 invasion of Iraq he warned of a possible "Tonkin Gulf scenario" that could be used to justify going to war, and called on government "insiders" to go public with information to counter the Bush administration's pro-war propaganda campaign, praising Scott Ritter for his efforts in that regard. He later supported the whistleblowing efforts of British GCHQ translator Katharine Gun and called on others to leak any papers that reveal government deception about the invasion. Ellsberg also testified at the 2004 conscientious objector hearing of Camilo Mejia at Fort Sill, Oklahoma.