With never-before-seen footage, '9/11 + 20' reveals in real time how New Yorkers struggled to make sense out of the panic, confusion, fear, and evil that gripped their city as they watched the World Trade Center burn...then collapse. 20 years later, those same people with front row seats to history on one of America's darkest days will be located and interviewed for an episodic docu-series recounting their experiences and exploring how that day changed their lives.