Counting Letters News Today

Mail at all. >> reporter: her other son larry served in vietnam, survived but still struggles with post traumatic stress disorder. >> all the time i think of these people and their families at home. >> reporter: six years ago, cooper started counting letters. since then she sent nearly 7,000. her hands are getting tired. this grandma to the troops tells us her mission is far from over. >> i decided i am going to write as long as i can, and i just respect everything that you do. >> how about that...