OMAHA, NE -- Clark Gary Mathisen, 81, Omaha, formerly of Elk Horn, died July 1. Services will be held Wednesday, July 6 at 11 a.m. at Morning Star Lutheran Church in Omaha with a graveside service Wednesday at 3 p.m. at the Atlantic Memorial Cemetery in Atlantic, with military honors. Family will receive friends Tuesday, July 5 from 3-7 p.m.