On September 11 , 2001 , Riegel and his wife Quyen witnessed the attacks on the World Trade Center . At one point , the couple was caught in the dust cloud formed by the collapse of the South Tower , but eventually escaped to Battery Park , where they witnessed the collapse of the North Tower in silence . Riegel captured video footage that was featured in several documentaries
attacks on the World Trade Center
September 11 attacks
Sam Riegel