PITTSBURGH -- Police have arrested two Maryland men accused of stealing elk antlers valued at more than $500,000 from a vendor at the National Rifle Association convention in Pittsburgh. Police said the victim, a 56-year-old professional elk hunter from Idaho, contacted them Monday night to report that two sets of antlers were stolen from his booth at the David L. Lawrence Convention Center while he was waiting with his truck at a loading dock. One set of antlers, which has a score of 522 inches, is appraised at $500,000, while the second, which has a score of 486 inches, is...