Coretta once said that while Martin had to be serious in public, he was a playful, humorous family man. See glimpses of that in these heartwarming images.

Martin Luther King Jr., a reverend and civil-rights activist, was assassinated at 39. However, he inspired several movements and political changes.

MARTA officials say the “commemorative bus reflects MARTA’s ongoing commitment to equity and highlights the historical connection between public transit and the Civil Rights Movement.”