>> bret: matt finn in chicago. thank you. a federal court says that the practice of north carolina elected officials opening meetings with a christian prayer is unconstitutional. the fourth u.s. circuit court of appeals upheld a lower court ruling concerning roman county commissioners. the case could be heading for the u.s. supreme court. when you go outside and look up at the sky, what you may see is not a bird or a plane or even superman, it is a drone. and the more of them are, the greater likelihood of an accident. tonight, correspondent jonathan serrie tells us about a major effort to keep that from happening. >> just in the last 18 months, we've registered twice as many unmanned aircraft than we registered all aircraft in the previous 100 years. from crop dusting to package delivering, commercial drones are about to become a part of everyday life. to safely integrate vast numbers of new unmanned aircraft into the nation's airspace, the faa is relying on the shore, a group of research institutions led by mississippi stat