Uniting musicians, actors, and celebrities, the four biggest television networks will on Friday (Sept. 21) simulcast a special benefit for victims of last week's terrorist attack on the U.S. "America: A Tribute to Heroes" will air at 9 p.m. ET/CT on ABC, CBS, NBC, and Fox, as well as any other TV or radio network that wants to join. Musicians already confirmed to participate include Bruce Springsteen, Sheryl Crow, Billy Joel, Faith Hill, Paul Simon, Will Smith, Stevie Wonder, and Neil Young.