( Courtesy photo) At the dedication of the 9/11 Memorial and Museum in New York in 2014, President Barack Obama (right) greets Ling Young (left), a survivor of the south tower of the World Trade Center, and Alison Crowther, whose son Welles was credited with saving Young and other survivors. The moment is show in the documentary "Man in Red Bandana," which chronicles Welles Crowther's heroism.