The engagement and forthcoming marriage of Jessica M. Harrison and?Kenneth L?. Traw has been announced. Jessica is from Eau Claire, Wis., and Ken is from Mammoth Spring. Both are Staff Sergeants in the U.S. Air Force and are stationed at Lajes Field, Azores, Portugal.The wedding is planned for June 8 at 7 p.m. at Mammoth Spring State Park. All relatives and friends are invited to attend. A reception will follow the ceremony at the Mammoth Spring Music Hall.