Throughout the early 21st century until his death in 2016 , Fo remained an active participant and campaigner on various political , social and cultural issues . He questioned the official accounts of the September 11 attacks and the collapse of the World Trade Center buildings in the film , '' Zero : An Investigation into 9/11 '' . In 2008 , he was among the signatories of an open letter to '' la Repubblica '' which called on the state to protect Roberto Saviano , whose life was under threat after exposing the clandestine activities of the Camorra in his 2006 book '' Gomorrah '' . Ahead of the 2013 Italian general election , Fo explained that the most recent targets of his satire included : “ The banks mostly , and the big entrepreneurs . All those who hold the reins ' the show within a show ' , i.e. those who – through the media , television and in other ways – make every effort to ensure that the people accept the conditions they find themselves in . ” On 13 October 2016 Fo died at the age of 90 due to a serious respiratory disease which had previously forced him to recover for 12 days in the Luigi Sacco hospital in Milan
September 11 attacks
September 11 attacks
Dario Fo