Warrant needed for GPS tracking, high court says (Update)
(AP) -- In a rare defeat for law enforcement, the Supreme Court unanimously agreed on Monday to bar police from installing GPS technology to track suspects without first getting a judge's approval. The justices ...
Scientists study hummingbirds flight to develop self-propelled surveillance devices
The secret to the flight of the hummingbird and other tiny birds and insects lies in the looping, swirling flow of air, called a vortex, that their flapping wings create.