We, the undersigned, wish to express our concerns to the management of the Powerhouse Museum that the museum premises are being used for a politically motivated group - especially one that promotes an unscientifically supported notion of conspiracy regarding the events of 11 September 2001 - as a venue for their propaganda. The use of a respected institution such as the Powerhouse Museum is lending undeserved respectability to such a group, when there are other venues available to the group which do not provide any unintentional association.