They're your neighbors, your friends, your colleagues, your parents. They are CNN Heroes, each of whom shows how one person can truly make a difference. All of this year's CNN Heroes were selected after being nominated by someone like you. This year's Top 10 CNN Heroes will be revealed on Thursday, Oct. 2. This year's campaign culminates with a salute to the Top 10 CNN Heroes of 2014. "CNN Heroes: An All-Star Tribute" airs Sunday, Dec. 7 on the global networks of CNN.