"20/20's" JAMI FLOYD REPORTS ON DNA TESTING, FRIDAY, SEPTEMBER 3 ON ABC

Plus: Superstar Marc Wahlberg Talks to ABC News' Chris Connelly; Lynn Sherr Investigates a Tradition in Thailand; John Stossel's 'Give Me A Break:' Excessive Warning Labels

This week ABC News' "20/20" investigates DNA paternity testing in a report by Jami Floyd, airing FRIDAY, SEPTEMBER 3 (10:00 - 11:00 p.m., ET), on the ABC Television Network.

Also: Marc Wahlberg talks to Chris Connelly about moving from hip-hop singer to hot film star to producing a much talked about new HBO series, "Entourage." Wahlberg also speaks candidly about becoming a father and his new responsibilities, saying that he plans to "focus on work for the next couple of years, and then I want to just focus on family. You know, by the time my daughter is ready to go to school, I want to be around all the time."

And: They're a spectacle for tourists, but is the tradition that decorates the necks of Thai women harmless or torture? Lynn Sherr reports.

Plus: John Stossel says "Give Me a Break" to some over-the-top warning labels.

ABCNEWS.com, the 24-hour news service of ABC News and part of the ABC Internet Group, will provide companion programming to the broadcast.

"20/20" is anchored by Barbara Walters and John Stossel. David Sloan is executive producer.