March 29, 2006 11:30 AM PST
The U.S. Department of Homeland Security already is using unmanned aircraft to patrol the Arizona border for illegal immigrants. Pictured here is the Israeli-built Hermes UAV, which has a price tag of around $2 million. It can fly in a radius of 120 miles for 20 hours at a cruising speed of about 90 miles an hour. Sensors can include GPS navigation, daylight video imaging, infrared imaging, laser ranging, radar, and GTMI (Ground Target Motion Indicator) analysis.
Photo by U.S. Department of Homeland Security
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