Sgt. Patrick Swanton of the Waco Police Department speaks to the media as Texas Department of Public Safety Trooper D.L. Wilson (left) stands near a Twin Peaks restaurant where nine members of a motorcycle gang were shot and killed in Waco, Texas, on Tuesday. Mike Stone/Reuters/Landov hide caption

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A helicopter flies over a section of Baltimore affected by riots. Richard Rothstein writes that recent unrest in Baltimore is the legacy of a century of federal, state and local policies designed to "quarantine Baltimore's black population in isolated slums." Patrick Smith/Getty Images hide caption

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Officers stand watch at the intersection of West North Avenue and Pennsylvania Avenue as protesters walk for Freddie Gray in Baltimore in April. Gray died from spinal injuries about a week after he was arrested and transported in a police van. Jabin Botsford/The Washington Post/Getty Images hide caption

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This combination made with file photos provided by the Madison, Wis., police department and Wisconsin Department of Corrections shows Madison Police officer Matt Kenny (left) and Tony Robinson, a biracial man who was killed by the officer. Kenny shot the unarmed 19-year-old in an apartment house on March 6. Uncredited/AP hide caption

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Oakland police officers, wearing body cameras, form a line during demonstrations against recent incidents of alleged police brutality nationwide. Elijah Nouvelage/Getty Images hide caption

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Charlotte Police Chief Rodney Monroe answers questions from the group. Lisa Wolf/WFAE hide caption

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Rev. Channing E. Phillips, (left) Rabbi Arthur Waskow, and Topper Carew on April 4, 1969, the night of the first Freedom Seder. Courtesy of Arthur Waskow hide caption

itoggle caption Courtesy of Arthur Waskow

Rick Ector trains new gun owners at a range just outside of Detroit. He supports more African-Americans getting permits to carry concealed weapons. Martin Kaste/NPR hide caption

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Larenda Myres holds an iced coffee drink with a "Race Together" sticker on it at a Starbucks store in Seattle. Starbucks baristas will no longer write "Race Together" on customers' cups starting Sunday. Ted S. Warren/AP hide caption

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Demonstrators of different races and religions from across the country united to take part in the historic march from Selma to Montgomery, Ala., 50 years ago. AP hide caption

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A makeshift memorial is seen on March 11 in Madison, Wis., in remembrance of 19-year-old Tony Robinson, who was fatally shot by a Madison police officer on March 6. Carrie Antlfinger/AP hide caption

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Madison Mayor Paul Soglin addresses a crowd of protesters on Martin Luther King Boulevard in Madison, Wis., during a protest of the shooting death of Tony Robinson. Andy Manis/AP hide caption

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