The FBI is searching for a trailer full of Raytheon Co. precision guidance systems used to test missiles, after the equipment was stolen Sunday. KVOA of Tucson, Ariz., reported that a thief rammed through locked gates to gain access to the parking lot where the trailer was parked. Authorities say the rig contained only missile testing equipment, rather than missile parts. Tucson police said the trailer and adjoining building are unmarked. "It seems like it was an opportunistic crime where somebody could have seen the trailer and decided they wanted the trailer with no thought about what was inside it,"...