THIEF RIVER FALLS, Minn. — It's rehearsal time in Thief River Falls, the opening night for "The Sound of Music" is rapidly approaching. And 7-year old Fifer Steer is scurrying around backstage, preparing for her summer stage debut Trying out for the musical came as a surprise.
"My cousin called me out of the blue and said, 'Hey they are doing "Sound of Music" this summer' and said 'We should go," said Brooke Larson Steer, Fifer's mother. And be…