ZEROING IN

摘要

To locate the FBI's most wanted man, geography professor Tom GiUespie and his students downloaded 3-D models of Tora Bora-bin Laden's last known location-from NASA's Landsat program and the Shuttle Radar Topography Mission. Next they applied species-movement theories to the images, giving them probable areas to search. To narrow the hunt, the class located the largest cities in the region. Then they purchased, for about $16, night imagery from the government's Defense Meteorological Satellites.