Hours after Amy Goodman, the host of the grass-roots newscast “Democracy Now!,” was arrested in Minnesota in 2008 while trying to cover protesters at the Republican National Convention, she was sitting in a network news studio above the convention floor, when a producer said: “I don’t get it. Why wasn’t I arrested?”

Ms. Goodman asked him, “Were you out on the streets?” No, he said, he had been in the studio the whole time. “I’m not being arrested here either,” she said she told him. “You’ve got to get out there.”

For Ms. Goodman, that exchange expresses both a shortcoming of the network newscasts that many Americans consume and a strength of “Democracy Now!,” the 15-year-old public radio and television program. The newscast distinguishes itself by documenting social movements, struggles for justice and the effects of American foreign policy, along with the rest of the day’s developments.

Operated as a nonprofit organization and distributed on a patchwork of stations, channels and Web sites, “Democracy Now!” is proudly independent, in that way appealing to hundreds of thousands of people who are skeptical of the news organizations that are owned by major media companies. The program “escapes the suffocating sameness that pervades broadcast news,” said John Knefel, a comedian and freelance writer who started listening about four years ago and now tries never to miss an episode.