RENEE MONTAGNE, HOST:
Good morning. I'm Renee Montagne. Police cars in Iowa and Florida are testing a secret weapon: a small cannon embedded in the grille. It shoots tracking bullets containing tiny GPS devices that can stick to the trunk of a suspect's car. Police could then follow a suspect at a leisurely pace instead of embarking on a dangerous high-speed chase. The weapon, very James Bond, except American police would need to get a warrant before attaching a GPS to a car. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.