Mara Liasson, Juan Williams, FNC, & NPR
However, this story points out that NPR is very uncomfortable with their stars appearing on FNC and is trying to get Liasson and Williams to cease appearing on FNC. Liasson only appears on The All Stars but the Politico story I link to notes that Juan Williams makes regular appearances on The O'Reilly Factor (a show I rarely watch) and even guest hosts The O'Reilly Factor.
Fortunately, neither is obligated to heel to NPR's wishes on this matter. Even more interesting is NPR notes the Whitehouse war on FNC is influencing their discussions with Williams and Liasson. However, the story notes that the Whitehouse is claiming victory in its war against FNC.
I do not believe NPR, I believe Whitehouse pressure on them spurred this move.
Bravo to Williams and Liasson for giving NPR the raspberry on this!