Code Switch Code Switch Frontiers of Race, Culture and Ethnicity

Chinese who operated small shops in New Orleans' Chinatown for many decades learned in 1937 that their small city-within-a-city was doomed to make way for a parking lot. Shown in front of one of the shops on Tulane Avenue between Elk Place and Rampart Street are Big Gee, seated, and Lee Sing, standing. The Times-Picayune/Landov hide caption

itoggle caption The Times-Picayune/Landov

Spider Martin's most well-known photograph, Two Minute Warning, shows marchers facing a line of state troopers in Selma moments before police beat the protestors on March 7, 1965. The day became known as Bloody Sunday. Spider Martin/Courtesy Tracy Martin hide caption

itoggle caption Spider Martin/Courtesy Tracy Martin

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Eight-year-old Tomás Rocha, a third grader at Malcolm X Elementary School in Berkeley, Calif., is among a handful of gender non-conforming students at the school. Brett Myers/Youth Radio hide caption

itoggle caption Brett Myers/Youth Radio

In this Sunday, Jan. 18, 2015, file photo, marchers hold up a their cellular phones to record the rapper Common and singer-songwriter John Legend performing at the foot of the Edmund Pettus Bridge. Brynn Anderson/AP hide caption

itoggle caption Brynn Anderson/AP

A Justice Department investigation of the Ferguson, Mo., police department concluded that black residents of the city were disproportionately targeted by police and the courts. Jeff Roberson/AP hide caption

itoggle caption Jeff Roberson/AP

"I knew why they chose Rosa" Parks instead of her as a symbol of the civil rights movement, Colvin says. "They thought I would be too militant for them." Julie Jacobson/AP hide caption

itoggle caption Julie Jacobson/AP

Freedom House paramedics, who first were deployed in the 1960s, provided a crucial service for Pittsburgh residents. The program became a national model for emergency medical transport and care. Courtesy of University of Pittsburgh hide caption

itoggle caption Courtesy of University of Pittsburgh