By JAMES RISEN
Iran’s supreme leader, Ayatollah Ali Khamenei.
While
American spy agencies have believed that the Iranians halted efforts to build a
nuclear bomb back in 2003, the difficulty in assessing the regime’s ambitions
was evident two years ago, when what appeared to be alarming new intelligence
emerged, according to current and former United States officials.
Intercepted
communications of Iranian officials discussing their nuclear program raised
concerns that the country’s leaders had decided to revive efforts to develop a
weapon, intelligence officials said.
That,
along with a stream of other information, set off an intensive review and
delayed publication of the 2010 National Intelligence Estimate, a classified
report reflecting the consensus of analysts from 16 agencies. But in the end,
they deemed the intercepts and other evidence unpersuasive, and they stuck to
their longstanding conclusion.
The
intelligence crisis that erupted in 2010, which has not been previously
disclosed, only underscores how central that assessment has become to matters
of war and peace.
Today,
as suspicions about Iran’s nuclear ambitions have provoked tough sanctions and
threats of military confrontation, top administration officials have said that
Iran still has not decided to pursue a weapon, reflecting the intelligence
community’s secret analysis. But if that assessment changes, it could lift a
brake set by President Obama, who has not ruled out military options as a last
resort to prevent a nuclear-armed Iran.
Publicly
and privately, American intelligence officials express confidence in the spy
agencies’ assertions. Still, some acknowledge significant intelligence gaps in
understanding the intentions of Iran’s leaders and whether they would approve
the crucial steps toward engineering a bomb, the most covert aspect of one of
the most difficult intelligence collection targets in the world.
Much
of what analysts sift through are shards of information that are ambiguous or
incomplete, sometimes not up to date, and that typically offer more insight
about what the Iranians are not doing than evidence of exactly what they are up
to.
As
a result, officials caution that they cannot offer certainty. “I’d say that I
have about 75 percent confidence in the assessment that they haven’t restarted
the program,” said one former senior intelligence official.
Another
former intelligence official said: “Iran is the hardest intelligence target
there is. It is harder by far than North Korea.
“In
large part, that’s because their system is so confusing,” he said, which “has
the effect of making it difficult to determine who speaks authoritatively on
what.”
And,
he added, “We’re not on the ground, and not having our people on the ground to
catch nuance is a problem.”
Iran
maintains that its nuclear program is for peaceful civilian purposes, but American
intelligence agencies and the International Atomic Energy Agency have picked up
evidence in recent years that some Iranian research activities that may be
weapons-related have continued since 2003, officials said. That information has
not been significant enough for the spy agencies to alter their view that the
weapons program has not been restarted.
Mossad,
Israel’s intelligence service, agrees with the American intelligence
assessments, even while Israeli political leaders have been pushing for quick,
aggressive action to block Iran from becoming what they describe as an
existential threat to the Jewish state.
“Their
people ask very hard questions, but Mossad does not disagree with the U.S. on
the weapons program,” said one former senior American intelligence official,
who, like others for this article, would speak only on the condition of
anonymity about classified information. “There is not a lot of dispute between
the U.S. and Israeli intelligence communities on the facts.”
In
trying to evaluate the potential perils of Iran’s nuclear program, the United
States’ spy agencies have spent years trying to track its efforts to enrich
uranium and develop missile technology, and watching for any move toward
weaponization — designing and building a bomb.
Hunting
for signs of the resumption of a weapons program is more difficult than
monitoring enrichment and missile-building activities, both of which require
large investments in plants, equipment and related infrastructure. American
intelligence officials said that the conversations of only a dozen or so top
Iranian officials and scientists would be worth monitoring in order to
determine whether the weapons program had been restarted, because
decision-making on nuclear matters is so highly compartmentalized in Iran.
“Reactors
are easier to track than enrichment facilities, but obviously anything that
involves a lot of construction is easier to track than scientific and
intellectual work,” said Jeffrey T. Richelson, the author of “Spying on the
Bomb,” a history of American nuclear intelligence. “At certain stages, it is
very hard to track the weapons work unless someone is blabbing and their
communications can be intercepted.”
The
extent of the evidence the spy agencies have collected is unclear because most
of their findings are classified, but intelligence officials say they have been
throwing everything they have at the Iranian nuclear program.
While
the National Security Agency eavesdrops on telephone conversations of Iranian
officials and conducts other forms of electronic surveillance, the National
Geospatial-Intelligence Agency analyzes radar imagery and digital images of
nuclear sites. Outside analysts believe high-tech drones prowl overhead; one
came down late last year deep inside Iranian territory, though American
officials said they lost control of it in Afghanistan.
Meanwhile,
clandestine ground sensors, which can detect electromagnetic signals or
radioactive emissions that could be linked to covert nuclear activity, are
placed near suspect Iranian facilities. The United States also relies heavily
on information gathered by inspectors with the International Atomic Energy
Agency who visit some of Iran’s nuclear-related facilities.
But
collecting independent human intelligence — recruiting spies — has been by far
the most difficult task for American intelligence. Some operational lapses —
and the lack of an embassy as a base of operations ever since the hostage
crisis three decades ago — have frequently left the C.I.A. virtually blind on
the ground in Iran, according to former intelligence officials.
In
2004, for example, the C.I.A. put a whole network of Iranian agents in jeopardy
after a technological mistake by an agency officer, according to former intelligence
officials.
In
2005, a presidential commission that reviewed the prewar failures of the
intelligence on Iraq’s supposed weapons of mass destruction faulted American
intelligence on Iran, saying it included little valuable information from
spies.
More
recently, the C.I.A. suffered a setback in efforts to question Iranian exiles
and recruit nuclear scientists. Two years ago, agency officials had to sort
through the wreckage of the strange case of Shahram Amiri, an Iranian scientist
who apparently defected to the United States in 2009 and then returned to Iran
in 2010 after claiming he had been abducted by the C.I.A.
His
case is eerily similar to that of Vitaly Yurchenko, a K.G.B. officer who
defected to the United States in 1985 and went back to the Soviet Union later
that year, claiming he had been drugged and kidnapped by the C.I.A.
Like
Mr. Yurchenko, Mr. Amiri’s case has provoked debate within the agency about
whether he was a genuine defector, and whether any of the information he
provided can be trusted.
The
United States and Israel share intelligence on Iran, American officials said.
For its spying efforts, Israel relies in part on an Iranian exile group that is
labeled a terrorist organization by the United States, the Mujahedeen Khalq, or
M.E.K., which is based in Iraq. The Israelis have also developed close ties to
Kurdistan in northern Iraq, and they are believed to use Kurdish agents who can
move back and forth across the border into Iran.
American
intelligence officials, however, are wary of relying on information from an
opposition group like the M.E.K., particularly after their experience in Iraq
of relying on flawed information provided by the Iraqi National Congress, an
exile group run by Ahmad Chalabi.
“I’m
very suspicious of anything that the M.E.K. provides,” said David A. Kay, who
led the C.I.A.’s fruitless effort to find weapons of mass destruction in Iraq.
“We all dealt with the Chalabis of the world once.”
Just
as in 2010, new evidence about the Iranian weapons program delayed the National
Intelligence Estimate in 2007, the last previous assessment. Current and former
American officials say that a draft version of the assessment had been
completed when the United States began to collect surprising intelligence
suggesting that Iran had suspended its weapons program and disbanded its
weapons team four years earlier.
The
draft version had concluded that the Iranians were still trying to build a
bomb, the same finding of a 2005 assessment. But as they scrutinized the new
intelligence from several sources, including intercepted communications in
which Iranian officials were heard complaining to one another about stopping
the program, the American intelligence officials decided they had to change
course, officials said. While enrichment activities continued, the evidence
that Iran had halted its weapons program in 2003 at the direction of the
supreme leader, Ayatollah Ali Khamenei, was too strong to ignore, they said.
One
former senior official characterized the information as very persuasive. “I had
high confidence in it,” he said. “There was tremendous evidence that the
program had been halted.”
And
today, despite criticism of that assessment from some outside observers and
hawkish politicians, American intelligence analysts still believe that the
Iranians have not gotten the go-ahead from Ayatollah Khamenei to revive the
program.
“That
assessment,” said one American official, “holds up really well.”
-This article was published in New York Times on 17/03/2012