Last year, Seattle became one of the nation's first cities to buy unmanned drones for use by the police department. Public reaction was less "Gee-whiz" than "What the heck?"
The phrase "unmanned drones" typically conjures images of places like Afghanistan. But the Federal Aviation Administration says it wants to start testing the civilian use of aerial drones here in the U.S. and has already issued special permits to a few police departments interested in trying them out.
The meteor that caused at least 1,000 injuries in Russia after a startling and powerful daytime explosion one week ago has been identified as a chondrite. Russian scientists who analyzed fragments of the meteor, whose large size and well-documented impact made it a rarity, say that its composition makes it the most common type of meteor we encounter here on Earth.