Excerpted from the Washington Post:
FBI counterintelligence investigators have in recent weeks questioned current and former U.S. officials about whether a small group of Iran specialists at the Pentagon and in Vice President Cheney's office may have been involved in passing classified information to an Iraqi politician or a U.S. lobbying group allied with Israel, according to sources familiar with or involved in the case.
The investigators have asked questions about personnel in the office of Pentagon Undersecretary for Policy Douglas J. Feith as well as members of the influential Defense Policy Board...
Investigators have specifically asked about a group of neoconservatives involved in defense issues, including Feith, Deputy Defense Secretary Paul D. Wolfowitz, Iraq and Iran specialist Harold Rhode and others at the Pentagon. FBI agents also have asked current and former officials about Richard Perle of the defense board and David Wurmser, an Iran specialist and principal deputy assistant for national security affairs in Cheney's office...
The initial interest was: Do you believe certain people would spy for Israel and pass secret information?" said one source interviewed by the FBI about the defense officials...
[Oh, Israel would never spy on us, we're such good friends.]
(The)investigation...dates back more than two years and includes diverse threads, U.S. officials and people close to the case said.
One aspect of the probe concerns AIPAC and another looks at whether intelligence on Iran ended up in the hands of Iraqi National Congress leader Ahmed Chalabi, a longtime Pentagon favorite once considered a possible replacement for Saddam Hussein.
Iran has been a particularly controversial issue within the Bush administration, which still does not have a formal policy more than 3 1/2 years after taking office.
A small group of Pentagon neoconservatives [Real men go to Tehran] opposed a draft directive because it did not support a change of governments in Tehran, which they advocated, current and former U.S. officials said.
The officials whose names came up during questioning have strong ties to Israel. They also share a long-standing position on Iran and other radical regimes. Wurmser, Feith and Perle were co-authors of a 1996 policy paper for then-Israeli Prime Minister Binyamin Netanyahu titled "A Clean Break: A New Strategy for Securing the Realm." It called for removing Hussein from power in Iraq as part of a broad strategy to transform the region and remove radical regimes.
...officials also concede that Israel is one of the three countries most active in spying on the United States. Israel denies conducting espionage in the United States.