New Delhi, June 19 -- Of the many cruel aspects of slavery, the shackles used to restrain and dehumanize over 12 million Africans across three centuries may be the most visceral tangible reminder.

At the Roots 101 Museum in Louisville, Kentucky, shackles made 400 years ago in Ghana are among the many relics of the African American experience on display. They were donated by a collector and activist. But Lamont Collins, who founded the museum in 2020, doesn't just show them. He puts them on the wrists of willing visitors.

"It's such a deep learning tool," Collins says. "No matter how we hear people tell stories, how people try to change the story, the reality of the stories is in those shackles. Nobody can deny the reality of what you fe...