Credit: Vanessa FilleyA large photo of Mr. Sanders with Dr. Martin Luther King Jr. was taken at Jesse Jackson’s first Black Expo in Chicago in 1967. “My wife’s family came here in 1942,” Mr. Sanders explained. Mr. Sanders motioned to a large, framed photo of his wife, Rosamond (Roz), who died in 2019. But it was the African-American teachers who found ways to teach us African-American history and to motivate us. Mr. Sanders asked.