elatives and friends are invited to Nelson's Life Celebration on Monday, May 20 from 2 to 4 and 6 to 8 p.m. at the Kalas Funeral Home & Crematory, 6160 Oxon Hill Road, Oxon Hill, MD 20745. Mass of Christian Burial will be offered on Tuesday, May 21 at 10 a.m. at St. Columba Catholic Church, 7800 Livingston Road, Oxon Hill, MD 20745. Interment to follow at Resurrection Cemetery, 8000 Woodyard Rd., Clinton, MD 20735. In lieu of flowers, memorial contributions may be made to the charity of one's choice.