Lesley Stahl of 60 MINUTES talks with journalist Seymour Hersh. Tracy Smith chats with Oscar-nominated actor Rose Byrne. Mo Rocca talks with CBS News senior correspondent Norah O'Donnell about her new book, We the Women:The Hidden Heroes Who Shaped America. Nancy Giles visits the Studio Museum in Harlem, which recently reopened after a major renovation.Seth Doane takes a look at the highs and lows of the Winter Olympics in Italy. Dr. Jon LaPook reports on the history and current status of polio.