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
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
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
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
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
Charlotte Police Chief Rodney Monroe answers questions from the group. Lisa Wolf/WFAE hide caption
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
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
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
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
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
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
Protesters from the Young, Gifted and Black Coalition marched toward the scene of Saturday's shooting. Galen Druke/Wisconsin Public Radio hide caption
Milwaukee, Wis., lags behind in educating black children, incarcerates the most black men and is ranked one of the worst states to live for African-Americans. Morry Gash/AP hide caption
People stand marooned on housetops in the community of Vanport, Ore. on May 30, 1948 while water swirls through debris of their town. AP hide caption