The 80th anniversary of the liberation of Auschwitz by Soviet troops is being marked at the site of the former death camp, a ceremony that is widely being treated as the last major observance that any notable number of survivors will be able to attend. Among those who traveled to the site is 86-year-old Tova Friedman, who was 6 when she was among the 7,000 people liberated on Jan. 27, 1945.