We have to thank Melody Pigg for sending us another letter about her son Marshall Pigg. This is her 13th instillation and we're honored to publish it here. ---------------- One of the greatest gifts we've been given in life is our memory. The human brain has amazing capabilities to retain facts and figures, knowledge, and moments from your life. Some are moments that when reflected upon can bring you great joy. Then there are other life changing moments that can give you sadness and grief ...