The Washington field office of the FBI is actively investigating the founding chairman and acting executive director of the nation's premier Islamic-rights group in Washington, based on evidence that emerged from the largest terror-financing case in U.S. history, a blockbuster new book alleges. The Council on American-Islamic Relations, along with its founding chairman Omar M. Ahmad, were named by the U.S. Justice Department as unindicted co-conspirators in a criminal conspiracy led by the Holy Land Foundation charity to underwrite Palestinian terrorism. "CAIR has been identified by the government at trial as a participant in an ongoing and ultimately unlawful conspiracy...