With Diane Sawyer’s report “A Hidden America: Children of the Plains,” “20/20? surged over its lead-in by 1.6 million viewers and gained audience throughout the broadcast, producing its most-watched telecast in over 2 months and hit a 13-week high in the key Adult 25-54 news demo (since 8/5/11 and 7/8/11, respectively). According to Nielsen’s fast national data, the newsmagazine drew 4.74 million total viewers and a 1.7 rating among Adults 25-54.

Sawyer’s report took in-depth look at the young dreamers and survivors of the Pine Ridge Indian Reservation, fighting against decades of neglect.

In addition, an ABC News story about one young girl Sawyer met, Tashina Iron Horse, became the most popular story on Yahoo! News Friday.