et al., indictment, Nov. 4, 1998, and updates. IMINT The sort of imagery intelligence (IMINT), often from satellites, used against nation-states is of limited use in tracking the movement of groups of small size and little physical infrastructure. More success has come from unmanned aerial vehicles (UAV), which are hard to see and hear, to do such things as follow cars, or loiter above a building, photographic traffic in and out, often with low-light or infrared sensors that work in apparent darkness. For instance, the CIA experimented with the MQ-1 Predator, a small remote-controlled reconnaissance aircraft, to try to spot Bin Laden in Afghanistan, producing probable sightings of the al-Qaeda leader after a series of flights in autumn 2000, overseen by CTC officials and flown by USAF drone pilots at the CIA's Langley headquarters. FININT Financial intelligence – "following the money" – often can trace the organization behind a particular attack. Once that organization is identified, value transfers from it can point to other operational cells. The term value includes cash and negotiable documents, but also materials such as gems, opium and drugs, and precious metals. The Treasury Department's Office of Foreign Assets Control (OFAC) has the power to "freeze" the accounts of organizations suspected of funding terrorist activities. Terrorist groups use three types of financing, which are increasingly difficult to track by U.S. intelligence, including the CIA: Charities, which use both conventional financial institutions and informal value transfer systems, Informal value transfer systems such as hawala and hundi "Commodities- or trade-based money laundering includes the smuggling of bulk cash and the evasion of federal reporting requirements used to track money laundering with commodities such as diamonds, precious metals, gold, and tobacco." The CIA is most likely to gain awareness of commodities and trade transfers outside the United States. According to the Center for Defense Information (CDI), intelligence agencies help OFAC build its "freeze list" by sending it lists of individuals and organizations believed to be associated with terror, but not all such suspects go onto the freeze list, since the intelligence community can use financial transactions as a means of tracking them. One of the challenges of anti-terrorist FININT is that surveillance of transactions only works when the value transfers go through conventional, regulated banks and other financial institutions. Many cultures use informal value transfer systems, such as the hawala widely used in the Middle East and Asia, where