A “Celebration of Life” service in memory of Vicki Rae Snelson will be held 6-8 p.m. Thursday, Aug. 6, at James & Gahr Mortuary in Rolla. Snelson was a staff member at S&T from 1974 until her retirement in 2009 from the Rock Mechanics and Explosives Research Center. She passed away July 23 at the age of 65.