First, the heartwarming video. Then, the details: [HTML1] Cincinnati-area mom Karen Gardner has three sons in uniform: Aviation Electrician’s Mate 1st Class (AW) Charles Gardner, Electronics Technician 3rd Class (SS) Christopher Gardner, and Joey Gardner, who turns 7 on Halloween and plays linebacker and running back for the Anderson Wildcats. Christopher Gardner hasn’t exactly been available to attend many of his brother’s recent sporting events — he serves on the attack submarine Helena, which only recently returned to Norfolk, Va., from a six-month deployment. But when he did have some time on the surface and was able to make it…