National Public Radio has doubled its audience to 26 million in six years. “While the radio world has contracted in upon itself through consolidated ownership and copycat formats, public radio has only become more distinct, important and valuable. It looms ever larger on the U.S. dial simply as guardian of its niche. It’s expanding its news operation at a time when most others are cutting back. It’s in the midst of a $15 million, three-year plan to add 45 staffers and open new bureaus, including one in West Africa. But more important, listen to an NPR program for 30 seconds and you know you’re listening to NPR.”