Joan Baez Sr., activist and mother of folk singer Joan Baez, has died just days after her 100th birthday. Known as “Big Joan,” she was arrested along with her daughter and dozens of others in 1967 for blocking the entrance to an armed forces induction center in Oakland, California. While imprisoned at the Santa Rita County Jail, the mother and daughter received a visit from Rev. Dr. Martin Luther King Jr., who gave a news conference outside the jail praising their act of civil disobedience.

Rev. Dr. Martin Luther King. Jr.: “As an expression of my appreciation for what they are doing for the peace movement and for what they have done for the civil rights movement, I would take time out of my schedule to come out to see them, to visit them, and let them know that they have our absolute support. And I might say that I see these two struggles as one struggle. There can be — there can be no justice without peace, and there can be no peace without justice.”

King spoke outside the Santa Rita County Jail in January 1968 after visiting with the mother-daughter duo and the peace activist Ira Sandperl, who had all been imprisoned for protesting the Vietnam War. Sandperl died recently on April 13, at the age of 90, from a respiratory infection.