U.S. Begins UAV Surveillance Flights Along Texas-Mexico Border

摘要

Even from nearly 6 kilome-ters up, the synthetic aperture radar on the Predator un-manned aerial vehicle (UAV) can detect tire tracks, foot-prints, even a small cut someone made trying to slice through the tall steel wall that separates the U.S. from Mexico along parts of the Southwest border.rnMilitary technology devised for the wars in Iraq and Afghanistan is in increasing de-mand for homeland defense.