of my work. you get to work with thousands of great volunteers and it's very tangible. >> it gives you such a sense of accomplishment saying i did that. >> essentially what everybody is doing is serving their country and making it a better place. >> good game, good game, good game, good game. y yes, we got it. did you guys love it today, yeah. >> i hope to come back next year. create the same sort of opportunity. the river shouldn't be trashed. with your help we're making a difference. let's give it up. >> i've never thought of myself as environmentalist. i just thought of myself as a person who cared. i'm still on the same mission i started, a cleaner river but the message of our work is we can make change. just take action, just get involved. anything is possible. you can make a big difference. >> and tune in this sunday night to cnn heroes, an all star tribute and meet the person