For the past 20 years, Frank Ritter has meticulously documented the aftermath of the 9/11 tragedy as well as the rebuilding efforts at the World Trade Center Site through his expert camera work. What began as a commission by the American Institute of Architects to photograph the commemorative events of the first anniversary of the attacks, led Ritter on a journey to record these solemn ceremonies every year since. In this powerful visual timeline, which includes personal accounts from survivors and first-responders, the reader/viewer understands how the tragedy of 9/11 was not a single event, but one that will continue to evolve and shape our collective memory.