Living volume 23, number 192, September 17-24, 2009 By Indy Staff Thu Sep 17, 2009 | 12:00am Share this: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Print (Opens in new window) Print Email a link to a friend (Opens in new window) Email Add on Google Add the SB Independent as your preferred source to see more of our stories on Google. A Towering Debate: Engineers and Architects Argue About What Made the World Trade Center Fall (Jay Levin and Tom McKenzie)