In 2003  or 2004 , Pakistani  intelligence agents trailed a  suspected militant courier to a  house in the picturesque hill town  of Abbottabad in northern  Pakistan. There, the agents determined that  the courier would make contact  with one of the world's most  wanted men, Abu Faraj al-Libbi,  who had succeeded September 11  mastermind Khalid Sheik  Muhammad as al Qaeda  operations chief a few months  earlier. Agents from Pakistan's powerful  and mysterious Inter-Services  Intelligence agency, known as the  ISI, raided a house but failed to  find al-Libbi, a senior Pakistani  intelligence official told Reuters  this week. Former Pakistan President Pervez  Musharraf later wrote in his  memoirs that an interrogation of  the courier revealed that al-Libbi  used three houses in Abbottabad,  which sits some 50  km (30  miles)  northeast of Islamabad. The  intelligence official said that one  of those houses may have been in  the same compound where on May  1  US special forces killed al Qaeda  leader Osama bin Laden. It's a good story. But is it true?  Pakistan's foreign ministry this  week used the earlier operation as  evidence of Pakistan's commitment to the fight against terrorism. You  see, Islamabad seemed to be  pointing out, we were nabbing bad guys seven years ago in the very  neighborhood where you got bin  Laden. But US Department of Defense  satellite photos show that in 2004  the site where bin Laden was  found this week was nothing but  an empty field. A US official  briefed on the bin Laden operation told Reuters he had heard nothing  to indicate there had been an  earlier Pakistani raid. There are other reasons to puzzle.  Pakistan's foreign ministry says  that Abbottabad, home to several  military installations, has been  under surveillance since 2003.  If  that's true, then why didn't the ISI  uncover bin Laden, who US officials say has been living with his family  and entourage in a well-guarded  compound for years? The answer to that question goes  to the heart of the troubled  relationship between Pakistan and  the United States. Washington has  long believed that Islamabad, and  especially the ISI, play a double  game on terrorism, saying one  thing but doing another. MARRIAGE OF CONVENIENCE Since 9 /11  the United States has  relied on Pakistan's military to  fight al Qaeda and Taliban forces  in the mountainous badlands along Pakistan's border with Afghanistan. President George W Bush forged a  close personal relationship with  military leader Musharraf. But US officials have also grown  frustrated with Pakistan. While  Islamabad has been instrumental  in catching second-tier and lower  ranked al Qaeda and Taliban  leaders, and several operatives  identified as al Qaeda "number  threes" have either been captured  or killed, the topmost leaders - bin  Laden and his Egyptian deputy  Ayman al Zawahiri -- have  consistently eluded capture. The ISI, which backed the Taliban  when the group came to power in  Afghanistan in the mid-1990 s,  seemed to turn a blind eye -- or  perhaps even helped -- as Taliban  and al-Qaeda members fled into  Pakistan during the US invasion of  Afghanistan after 9 /11 , according  to US officials. Washington also believes the  agency protected Abdul Qadeer  Khan, lionized as the "father" of  Pakistan's bomb, who was arrested  in 2004  for selling nuclear secrets  to Iran, Libya and North Korea. And when Kashmiri militants  attacked the Indian city of Mumbai  in 2008 , killing 166  people, New  Delhi accused the ISI of controlling  and coordinating the strikes. A key  militant suspect captured by the  Americans later told investigators  that ISI officers had helped plan  and finance the attack. Pakistan  denies any active ISI connection to  the Mumbai attacks and often  points to the hundreds of troops  killed in action against militants as proof of its commitment to fighting terrorism. But over the past few years  Washington has grown increasingly suspicious-and ready to criticize  Pakistan. The U.S. military used  association with the spy agency as  one of the issues they would  question Guantanamo Bay  prisoners about to see if they had  links to militants, according to  WikiLeaks documents made  available last month to the New  York Times. US Secretary of State Hillary  Clinton said last July that she  believed that Pakistani officials  knew where bin Laden was holed  up. On a visit to Pakistan just days  before the Abbottabad raid,  Admiral Mike Mullen, chairman of  the US Military's Joint Chiefs of  Staff, accused the ISI of  maintaining links with the Taliban. As the CIA gathered enough  evidence to make the case that bin Laden was in Abbottabad, US intel  chiefs decided that Pakistan should be kept in the dark. When US Navy  Seals roped down from helicopters  into the compound where bin  Laden was hiding, US officials  insist, Pakistan's military and intel  bosses were blissfully unaware of  what was happening in the middle  of their country. Some suspect Pakistan knew more  than it's letting on. But the  Pakistani intelligence official, who  asked to remain anonymous so  that he could speak candidly, told  Reuters that the Americans had  acted alone and without any  Pakistani assistance or permission. The reality is Washington long ago  learned to play its own double  game. It works with Islamabad  when it can and uses Pakistani  assets when it's useful but is ever  more careful about revealing what  it's up to. "On the one hand, you can't not  deal with the ISI... There definitely  is the cooperation between the two agencies in terms of personnel  working on joint projects and the  day-to-day intelligence sharing,"  says Kamran Bokhari, Middle East  and South Asia director for global  intelligence firm STRATFOR. But " there is this perception on the part  of the American officials working  with their counterparts in the ISI,  there is the likelihood that some of these people might be working  with the other side. Or somehow  the information we're sharing  could leak out... It's the issue of  perception and suspicion." The killing of bin Laden exposes  just how dysfunctional the  relationship has become. The fact  that bin Laden seems to have lived for years in a town an hour's drive  from Islamabad has US  congressmen demanding to know  why Washington is paying $1  billion a year in aid to Pakistan.  Many of the hardest questions are  directed at the ISI. Did it know bin  Laden was there? Was it helping  him? Is it rotten to the core or is it  just a few sympathizers? What's clear is that the spy agency  America must work within one of  the world's most volatile and  dangerous regions remains an  enigma to outsiders. GENERAL PASHA ISI chief Lieutenant General Ahmed Shuja Pasha visited Washington on  April 11 , just weeks before bin  Laden was killed. Pasha, 59 ,  became ISI chief in September  2008 , two months before the  Mumbai attacks. Before his  promotion, he was in charge of  military operations against Islamic  militants in the tribal areas  bordering Afghanistan. He is  considered close to Pakistan  military chief General Ashfaq  Parvez Kayani, himself a long-time  ISI chief. A slight man who wastes neither  words nor movements, Pasha  speaks softly and is able to project  bland anonymity even as he sizes  up his companions and  surroundings. In an off-the-record  interview with Reuters last year, he spoke deliberately and quietly but  seemed to enjoy verbal sparring.  There was none of the bombast  many Pakistani officials put on. Pasha, seen by US officials as  something of a right-wing  nationalist, and CIA Director Leon  Panetta, who was in the final  stages of planning the raid on  Osama's compound, had plenty to  talk about in Washington. Joint  intelligence operations have been  plagued by disputes, most notably  the case of Raymond Davis, a CIA  contractor who shot dead two  Pakistanis in Lahore in January.  Davis was released from jail earlier this year after the victims' families  were paid "blood money" by the  United States, a custom sanctioned under Islam and common in  Pakistan. Then there are the Mumbai  attacks. Pasha and other alleged  ISI officers were named as  defendants in a US lawsuit filed  late last year by families of  Americans killed in the attacks. The lawsuit contends that the ISI men  were involved with Lashkar-e- Taiba, an anti-India militant group, in planning and orchestrating the  attacks. An Indian government report seen  by Reuters states that David  Headley, a Pakistani-American  militant who was allied with  Lashkar-e-Taiba and who was  arrested in the United States last  year, told Indian interrogators  while under FBI supervision that ISI officers had been involved in  plotting the attack and paid him  $25 ,000  to help fund it. Pakistan's government said it will " strongly contest" the case and  shortly after the lawsuit was filed  Pakistani media named the  undercover head of the CIA's  Islamabad station, forcing him to  leave the country. TECHNIQUE OF WAR The ISI's ties to Islamist militancy  are very much by design. The Pakistan Army's humiliating  surrender to India in Dhaka in 1971 led to the carving up of the country into two parts, one West Pakistan  and the other Bangladesh. The  defeat had two major effects: it  convinced the Pakistan military  that it could not beat its larger  neighbor through conventional  means alone, a realization that  gave birth to its use of Islamist  militant groups as proxies to try to  bleed India; and it forced  successive Pakistani governments  to turn to Islam as a means of  uniting the territory it had left. These shifts, well underway when  the Soviet Union invaded  Afghanistan in 1979 , suited the  United States at first. Working with  its Saudi Arabian ally, Washington  plowed money and weapons into  the jihad against the Soviets and  turned a blind eye to the excesses  of Pakistan's military ruler, General Zia ul-Haq, who had seized power  in 1977  and hanged former Prime  Minister Zulfikar Ali Bhutto in 1979. Many Pakistanis blame the current  problems in Pakistan in part on  Washington's penchant for  supporting military rulers. It did  the same in 2001  when it threw it  its lot with Musharraf following the attacks on New York and  Washington. By then, the rebellion  in Indian Kashmir had been going  since 1989 , and US officials back in 2001  made little secret that they  knew the army was training,  arming and funding militants to  fight there. That attitude changed after India  and Pakistan nearly went to war  following the December 2001  attack on India's parliament, which  New Delhi blamed on Pakistan- based militant groups -- a charge  Islamabad denied. Musharraf  began to rein in the Kashmiri  militant groups, restricting their  activity across the Line of Control  which divides the Indian and  Pakistani parts of Kashmir. But he  was juggling the two challenges  which continue to defy his  successor as head of the army,  General Ashfaq Kayani -- reining in the militant groups enough to  prevent an international backlash  on Pakistan, while giving them  enough space to operate to avoid  domestic fall-out at home. The ISI has never really tried to  hide the fact that it sees terrorism  as part of its arsenal. When  Guantanamo interrogation  documents appearing to label the  Pakistani security agency as an  entity supporting terrorism were  published recently, a former ISI  head, Lt. General Asad Durrani,  wrote that terrorism "is a  technique of war, and therefore an instrument of policy." Critics believe that elements of the ISI -- perhaps an old guard that  learned the Islamization lessons of  General Zia ul-Haq a little too well  -- maintain an influence within the  organization. "It is no secret that  Pakistan's army and foreign  intelligence service, the Inter- Services Intelligence (ISI)  directorate, actively cultivated a  vast array of Islamist militants -  both local and foreign, from the  early 1980 s until at least the  events of September 11 , 2001 -  as  instruments of foreign policy,"  STRATFOR wrote in an analysis  posted on its website this week. LIST OF GRIEVANCES That legacy is at the heart of  Washington's growing mistrust of  the ISI. Take the agency's ties to the  powerful Afghan militant group  headed by Jalaluddin Haqqani,  which has inflicted heavy  casualties on U.S. forces in the  region. "We sometimes say: You are  controlling -- you, Pasha -- you're  controlling Haqqani," one US  official said, speaking to Reuters  on condition of anonymity. "Well, Pasha will come back and  say ... 'No, we are in contact with  them.' Well, what does that really  mean?" "I don't know but I'd like our  experts to sit down and work out: Is this something where he is trying ( to), as he would put it, know more  about what a terrorist group in his  country is doing. Or as we would  put it, to manipulate these people  as the forward soldiers of Pakistani influence in Afghanistan." When US Joint Chiefs head Admiral  Mike Mullen visited Islamabad last  month he was just as blunt. "Haqqani is supporting, funding,  training fighters that are killing  Americans and killing coalition  partners. And I have a sacred  obligation to do all I can to make  sure that doesn't happen," Mullen  told a Pakistani newspaper. "So that's at the core -- it's not the  only thing -- but that's at the core  that I think is the most difficult  part of the relationship." Just across the border in  Afghanistan, Major General John  Campbell reaches into a bag and  pulls out a thick stack of cards with  the names and photos of coalition  forces killed in the nearly year- long period since he's been on the  job. Many of the men in the photos were killed by Haqqani fighters. "I carry these around so I never  forget their sacrifice," Campbell  said, speaking to a small group of  reporters at US Forward Operating  Base Salerno in Khost province. "There are guys in Pakistan that  have sanctuary that are coming  across the border and killing  Americans... we gotta engage the  Pakistanis to do something about  that," he said. Campbell calls the Haqqani  network the most lethal threat to  Afghanistan, where US forces are  entrenched in a near decade-old  war. "The Haqqani piece, it's sort of like a Mafia-syndicate. And I don't know at what level they're tied into the  ISI -- I don't. But there's places ...  that you just see that there's  collusion up and down the border," he said. DRONE WARS Another contentious subject  discussed on Pasha's trip to  Washington was the use of missile- firing drones to attack suspected  militant camps on Pakistani  territory. Once Obama moved into the White House, the drone program begun  by the Bush Administration not  only continued, but according to  several officials, increased.  Sometimes drone strikes in the  tribal areas of Pakistan took place  several times in a single week. US officials, as well as counter- terrorism officials from European  countries with a history of Islamic  militant activity, said that they had no doubt that the drone campaign  was seriously damaging the ability  of al Qaeda's central operation, as  well as affiliated groups like the  Pakistani and Afghan Taliban, to  continue to use Pakistan as a safe  haven. But the increasingly obvious use of  drones made it far more difficult  for either the CIA or its erstwhile  Pakistani partners, ISI, to pretend  that the operation was secret and  that Pakistani officials were  unaware of it. Since last October,  the tacit cooperation between the  CIA and ISI which had helped  protect and even nurture the CIA's  drone program, began to fray, and  came close to breaking point. Before Pasha visited CIA  headquarters in Langley, Virginia,  last month, Pakistani intelligence  sources leaked ferocious  complaints about the CIA in  general and the drone program in  particular, suggesting that the  agency, its operatives and its  operations inside Pakistan were  out of control and that if  necessary, Pakistan would take  forcible steps to curb them --  including stopping drone attacks  and limiting the presence of CIA  operatives in Pakistan. When Pasha arrived at CIA HQ, U.S. officials said, the demands leaked  by the Pakistanis to the media  were much scaled down, with  Pasha asking Panetta that the US  give Pakistan more notice about  drone operations, supply Pakistan  with its own fleet of drones (a  proposal which the United States  had agreed to but which had  subsequently stalled) and that the  agency would curb the numbers of  its personnel in Pakistan. US officials said that the Obama  administration agreed to at least  some measure of greater  notification to the Pakistani  authorities about CIA activities,  though insisted any concessions  were quite limited. Just weeks later, Obama failed to  notify Pakistan in advance about  the biggest U.S. counter-terrorist  operation in living memory,  conducted on Pakistani soil. LEARNING FROM HISTORY It was different the first time US  forces went after bin Laden. Washington's first attempt to kill  the al Qaeda leader came in  August 1998.  President Bill Clinton  launched 66  cruise missiles from  the Arabian Sea at camps in Khost  in eastern Afghanistan to kill the  group's top brass in retaliation for  the suicide bombings on US  embassies in Kenya and Tanzania. The CIA had received word that al  Qaeda's leadership was due to  meet. But Bin Laden canceled the  meeting and several US officials  said at the time they believed the  ISI had tipped him off. The US  military informed their Pakistani  counterparts about 90  minutes  before the missiles entered  Pakistan's airspace, just in case  they mistook them for an Indian  attack. Then US Secretary of State William  Cohen came to suspect bin Laden  escaped because he was tipped  off. Four days before the  operation, the State Department  issued a public warning about a " very serious threat" and ordered  hundreds of nonessential US  personnel and dependents out of  Pakistan. Some US officials said the Taliban could have passed the  word to bin Laden on an ISI tip. Other former officials have  disputed the notion of a security  breach, saying bin Laden had  plenty of notice that the United  States intended to retaliate  following the bombings in Africa. WHAT'S NEXT? Now that the US has finally killed  bin Laden, what will change? The Pakistani intelligence official  acknowledged that bin Laden's  presence in Pakistan will cause  more problems with the United  States. "It looks bad," he said. "It's  pretty embarrassing." But he  denied that Pakistan had been  hiding bin Laden, and noted that  the CIA had struggled to find bin  Laden for years as well. Perhaps. But the last few days are  unlikely to convince the CIA and  other US agencies to trust their  Pakistani counterparts with any  kind of secrets or partnership. Recent personnel changes at the  top of the Obama Administration  also do not bode well for salvaging the relationship. Panetta, a former Congressman  and senior White House official, is  a political operator who officials  say at least got on cordially, if not  well, with ISI chief Pasha. But  Panetta is being reassigned to take over from Robert Gates as  Secretary of Defense. His  replacement at the CIA will be  General David Petraeus, the  commander of U.S. military  operations in neighboring  Afghanistan. The biggest issue on Petraeus's  agenda will be dealing with  Pakistan's ISI. The US general's  relationship with Pakistani Army  chief of Staff Kayani, Pasha's  immediate superior, is publicly  perceived to be so unfriendly that  it has become a topic of discussion  on Pakistani TV talk shows. "I think it is going to be a very  strained and difficult relationship," said Bruce Riedel, a former adviser to Obama on Afghanistan and  Pakistan. He characterized the  attitude on both sides as "mutual  distrust." After a decade of American  involvement in Afghanistan,  experts say that Petraeus and  Pakistani intelligence officials  know each other well enough not  to like each other.
 

