Matthew Levitt, an expert on terrorism and the author of a new book critical of Hamas, says it is unlikely Hamas is going to change now that it controls the Palestinian government. "Being the government, I don't think, is going to moderate Hamas in the least," says Levitt, who is deputy assistant secretary for intelligence and analysis at the Treasury Department, and who wrote his book while serving as senior fellow and director of terrorism studies at the Washington Institute for Near East Policy.