When people are asked to name the great photographers of the 20th century, Ruth Bernhard's is unlikely to come up immediately. However she studied and worked with some of the greats: including Ansel Adams. Now 96 years old, Ruth Bernhards work encompasses seventy years of American photography. She is particularly recognized for her studies of the female figure. Ansel Adams called her the greatest photographer of the nude. Her work is now on display at the Minneapolis Institute of Arts. Minnesota Public Radio's Euan Kerr reports.