During the 1960s and 70s, protest posters served as rallying cries for peace, as defamations of the federal government, and as tributes to the martyrs of the civil rights movement.

Retrace two of the most influential Freedom Rides of 1961: the original CORE Freedom Ride and the Nashville Student Movement Ride.

A new photo book captures the 1960s ubiquity of a symbol that would become emblematic of the era.