Michelle Obama and three former first ladies are among dignitaries heading to California to pay tribute to Betty Ford at her funeral today. Ford died at the age of 93 on Friday. Ford is best known for helping to create the Betty Ford Center for substance abuse and alcohol treatment. Historian Susan Hartmann also praised Ford’s role as a feminist. Hartmann said, “Betty Ford was the first first lady to really be consistently, publicly (outspoken) about women’s rights and women’s issues. She was the most visible Republican feminist.”