The 9/11 Memorial & Museum faced a daunting challenge: how do you tell the story of the September 11 terrorist attacks at the World Trade Center without making it unbearable? How do you memorialize a day most of us wish we could forget? In 2013, Lesley Stahl visited the museum at Ground Zero, a year before it opened and explored its most challenging debates. Today marks 24 years since the September 11 terrorist attacks. | 60 Minutes

Foundation Hall is a room of massive scale with ceilings ranging from 40 to 60 feet. Here is the Last Column, covered with mementos, memorial inscriptions, and missing posters placed there by rescue and recovery workers. http://911memorial.io/1pwxM9Z | National September 11 Memorial & Museum