Robert Peraza, who lost his son Robert David Peraza, pauses at his son's name at the North Pool of the 9/11 Memorial during 10th anniversary ceremonies at the site of the World Trade Centre on September 11, 2011, in New York City. Getty Images
Robert Peraza, who lost his son Robert David Peraza, pauses at his son's name at the North Pool of the 9/11 Memorial during 10th anniversary ceremonies at the site of the World Trade Centre on SeptembShow more

The architecture of grief: how structures help us come to terms with loss




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