Great Lakes Naval Hospital 1966, Jennie and Terrie Frankel perform for wounded soldiers. The frequent visits by the twins (early Doublemint Twins) were arranged through the American National Red Cross (see letters of thanks to twins, posted also on Wikimedia under 'Great Lakes Naval Hospital October 24, 1966 Letter of thanks to Jennie and Terrie Frankel for entertaining wounded servicemen' - and - 'Great Lakes Naval Hospital - 1966 American Red Cross Thank you letter to Jennie Frankel and Terrie Frankel for Performance in Wards').