with a huge volume of letters that uncle eddie wrote home. take a listen. >> a lot of these letters start when he is 19. he is dead by 23. and you see his maturation process. it starts off with someone who is proud to be someone who wants to serve his country and get the job done. by the end of it he is someone who has seen terrible things, but is absolutely steel in his conviction that it was the right thing to have done. and wants to keep going. he lives all the way through the war in europe. and then wants to go over to japan. but unfortunately dies before he gets there. >> it's a side of steven colbert that most people have not seen. he gets very emotional talking