After 25 years, Barbara Walters is leaving her signature gig as host of ABC's 20/20 this fall. But the 72-year-old TV icon is not retiring from the news biz. She'll keep her day job as producer/cohost of The View and continue doing prime-time specials for the network. "I want to have more flexibility in my life," she says, "without the responsibilities of a weekly newsmagazine." It must be nice.