Mrs. Muriel Walker, 89, played dozens of supporting roles for her family and community during her lifetime: nurse, union organizer, church volunteer, political activist and community board member. She was also a trailblazer. Mrs. Walker was not only the first African-American registered nurse to be hired at Cleveland Clinic Akron General — then called People’s Hospital — but the first African-American hired at the hospital.She was active in the community and politics.