I think we all knew where we were during 9/11 2001, an event seared into the minds of all who witnessed it and into the hearts of all those who were directly affected by it, forever. The impact on their lives is hard to feel in tangible terms. Most of us around the world saw it through television screens and for once it wasn't a story that felt so far away. The direct lasting impact of 9/11 on New Yorkers (and others) has been one of long term PTSD for many, cancer and other related illnesses for others and a complex array of lawsuits over compensation that took a team a long time to resolve (See the film Worth, for an excellent dramatisation regarding that specific issue) Then there is Building Seven (WT7) also known as the Salomon building, which collapsed, almost in demolition style, later the same day. The nature of the buildings collapse, partially caused by damage sustained by the collapse of WT1 & WT2, mirrored that of a controlled demolition and gave rise to a number of conspiracy theories regarding if its demise was intentional or not. Now I will add here I am not an advocate that 9/11 was a US Government conspiracy. I do not believe there was a widely orchestrated cover-up. However I am a bigger believer in free speech and also a firm believer in listening to a well articulated argument and there still questions that many feel are unresolved. It is often the role of a documentary film maker to establish facts and ask questions, and find answers to such issues they seek to tackle in their narratives. Questioning any official version of the events in questions comes with an inherent risk of career suicide. So before one is so dismissive of a work, it's always best to actually watch it first and understand the film makers motivations behind it.