NEW YORK In an unprecedented honor for the Rupert Murdoch-led network, the Fox News Channel today won the Pulitzer Prize for fiction. In its official statement, the prize committee praised Fox for exhibiting an imagination and inventiveness that rival the best of Charles Dickens and J.R.R. Tolkien. In hailing Fox, the committee singled out the networks fourteen-part story about President Obamas birth in a mud-hut in Kenya. For Mr. Murdoch, the stunning Pulitzer Prize win was a rare bright spot in what he acknowledged had been a difficult year. When I first heard about the Pulitzer committees decision, I didnt believe it, he said. I had to listen to their voicemails to hear it for myself.