 Meyssan's book "" ("L'Effroyable imposture") challenges the official account of events of the September 11 terrorist attacks.In 1994, Meyssan became a staff member of the Radical Party of the Left (PRG), a centrist political organization, and he participates in the campaign of Bernard Tapie (1994 European elections) and Christiane Taubira (2002 presidential elections).In 1994, he founded the Voltaire Network and also created Project Ornicar, associations promoting freedom of expression and thinking, of which he is currently president.