A little off-topic but it is GPS related!
Police firing GPS tracking 'bullets' at cars during chases
In Iowa and Florida, they have a new method of chasing suspects. The police car's grill opens up and out is projected a better method of keeping up with the vehicle they're chasing.
Very James Bond! And a great idea too. But a bit pricey at $500 per bullet. And the first time an innocent party gets hit by a wayward "bullet"?