In the late 1990s he produced a book called '' America Wide '' , which features landscapes of many U.S. states . It was completed a few days before the September 11 attacks in 2001 . He published a sequel , '' Spirit of America '' , in 2006 . In 2003 Ken Duncan released '' 3D Australia '' &mdash; popularizing 3D printing
September 11 attacks
September 11 attacks
Ken Duncan (photographer)