"Sisters, Sisters, There were never such devoted sisters," warbled Rosemary Clooney and Rosemary Clooney in White Christmas. (Yes, Clooney was the stand-in singing voice for Vera-Ellen for that number in the 1954 film.) But what if siblings are not so devoted to each other? What if their lives have taken too many wrong turns, individually, […] The post Review: The Value of Moscow from Dark Horse Theatre Company app…