There are families who know the grief of a loved one never coming home. What those families have are lasting memories. Some have something tangible something they can hold in their hands. The letters from overseas that made it home, even if the author didn't.Robbie and Steve McKee are Gold Star parents. Their son, U.S. Army Staff Sgt. Kyle McKee, was everything a soldier could be."That's all he wanted to be was a soldier," Robbie McKee said."He …