Now a lead figure in the self-described ”9/11 truth movement”, an American architect, Richard Gage, has revealed one of its most high-profile adherents to date: Jan Utzon, son of the world-famous designer of the Sydney Opera House, Joern Utzon.

In a video posted on YouTube during his current visit to Sydney, Mr Utzon is interviewed by Mr Gage and endorses his call for a new inquiry into the September 11, 2001, attacks.