Luci Baines Johnson

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Social activist Julian Bond and Luci Baines Johnson hold hands as the crowd sings along "We Shall Overcome," during the Civil Rights Summit at the LBJ Presidential Library in Austin, TX on Wednesday, April 10, 2014. President Barack Obama, celebrating a half-century of the Civil Rights Act, used the image of Lyndon B. Johnson to urge perseverance and courage to move civil rights forward. The nation’s first black president spoke at the Civil Rights Summit, examining the 50th anniversary of Johnson’s signing the seminal act ending segregation. (AP Photo/The Dallas Morning News, Vernon Bryant)