Here, as Black History Month kicks off, LIFE.com presents a gallery of photos - many of which never ran in LIFE magazine - from a series of protests and sit-ins in Petersburg, Virgina, in May 1960, and from a broader-themed planning conference sponsored by Martin Luther King Jr. and the Southern Christian leadership Council at Atlanta University earlier that month. The pictures, by LIFE’s Howard Sochurek — a Princeton grad, Neiman Fellow at Harvard and WWII Army vet..
