slowly healing. though ear specialists worried his hearing loss might become the worst of his injuries. >> there it is. a completely healed eardrum. >> reporter: aaron's leg injuries are also on the mend. >> i have my scars still. they're probably going to be there forever, but i don't have any problems. once in awhile i'll have some stings. >> bless those that lost their lives -- >> reporter: at the memorial, the boys found inspirtion seeing janie richard. >> it was inspiring to see her. i'll always have that in my head. >> reporter: 13 years young to go through something like that is absolutely unimaginable. i tell you, speaking of martin richard. there is a foundation his family has set up. mr8. so a lot will be running together in honor of the youngest victim. aaron's parents will be running the marathon tomorrow. we know that aaron won't be out