Dear John...For teacher Lily Hogan, those words would come to mean so much. She knew that giving back to the community brought joy into people's lives. When her fourth-grade class writes letters to the military overseas in Afghanistan, she takes up her own pen and leads her students by example - writing a letter to an unknown soldier.CPO John Griffin and his K-9 dog, Radar, have been through so much together over the last several years. Sniffing out...