A protester stands in front of police vehicles with his hands up during a demonstration in Ferguson, Mo., where in August 2014 a white police officer shot and killed an 18-year-old black man. Justin Sullivan/Getty Images hide caption

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Carlos Santana visits NPR for an interview about his new memoir The Universal Tone: Bringing My Story to Light. Maggie Starbard/NPR hide caption

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NPR's Michele Norris on Morning Joe. She joined the MSNBC program on the 50th anniversary of the March on Washington. screenshot from MSNBC.com hide caption

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Use #NPRAspen to share your ideas about improving education and learning. NPR hide caption

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Ione Brown, at age 47, is featured in a northern Minnesota newspaper, the Park Region Echo in 1950. Brown is the maternal grandmother of NPR's Michele Norris, co-host of All Things Considered. In an upcoming interview with host Michel Martin, Norris shares her family's complex history with matters of race, as chronicled in her new memoir The Grace of Silence.. 'The Grace of Silence' by Michele Norris hide caption

itoggle caption 'The Grace of Silence' by Michele Norris