DALLAS Prosecutors have produced scores of documents, audio and video tapes, and intercepted phone calls in their attempt to prove that a Muslim charity based in a suburban Dallas office park was actually a fund-raising arm of Middle Eastern terrorists.Much of the evidence has surfaced before in books, newspaper articles and previous trials. But those who track terror-financing say the document haul from the trial of the Holy Land Foundation for Relief and Development has also produced new information.They say the documents shed light on a web of related organizations of militant Palestinian supporters in the United States, some of...