| I n June 1964, three civil-rights volunteers disappeared in Philadelphia, Miss. In early August, 44 days later, police found their bodies buried in an earthen dam. The activists -- Michael Schwerner, 24, James Chaney, 21, and Andrew Goodman, 20 -- did not share a final resting place. In the '60s, no cemetery would take both blacks and whites. The three were part of the 1964 Freedom Summer, an effo |