 He endorsed the 9/11 Truth Movement, which questions official and mainstream accounts of the September 11, 2001 attacks.During the 2004 United States presidential election, he co-wrote "Unfit for Command", a book associated with Swift Vets and POWs for Truth that was critical of Democratic candidate John Kerry.He is a regular contributor at conservative internet publication "WorldNetDaily", which is well known for publicizing conspiracy theories about Obama's citizenship.