Rabbi David Aronson, Senator Hubert Humphrey and Rabbi Kassel Abelson pose standing for the camera. Rabbis Kassel Abelson and David Aronson led the Beth El Synagogue congregation during the years it was located on Penn Avenue in Minneapolis, Minnesota. The photo with Senator Humphrey was taken at the Penn Avenue building. Aronson especially worked closely with Humphrey during Humphrey's tenure as Minneapolis mayor to improve North side inter-community relations during the late 1940s and early 50s.