The National Imagery Office, which coordinates all US satellite activity, begins satellite surveillance of bin Laden’s bases and training camps in Sudan and Afghanistan. Also, bin Laden’s voice print, a computerized record of his voice is made from tapes of his speeches that were distributed in Saudi Arabia around the time of the Gulf War. The NSA is able to use the voice print to scan satellite and cell phone calls for a match. As a result, “on numerous occasions the NSA and CIA” are able to monitor bin Laden’s calls even if he is not using his usual satellite phone. [Reeve, 1999, pp. 206]
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