Top Spy Agencies of Pakistan: Inside the 3 Most Powerful Intelligence Forces Pakistan’s top intelligence agencies ISI, IB, and MI and their role in national security. Introduction: The Hidden World Behind Pakistan’s Security Shield When people talk about intelligence organizations on the global stage, names like CIA, MI6, and Mossad often dominate the discussion. Yet, among them are agencies that operate just as effectively often more quietly, more strategically, and with far