A Russian classical music trio will be performing at First Presbyterian next week as part of its national tour. Ekaterinburg Classical Trio, or Kat Trio, will perform at 7 p.m. July 30 at the downtown church and the concert is free and open to the public. The trio, which consists of a clarinetist, violinist and a pianist, will perform Russian classic music and original pieces as well as spirituals, inspirational songs and American standards.