INDIANAPOLIS — The National Rifle Association has been instructing Indiana's National Guard members on how to use concealed weapons after Republican Gov. Mike Pence directed the state's military bases and training centers to beef up security in response to recent attacks in Tennessee. According to a survey by The Associated Press, Indiana is the only state to enlist the NRA's help in the training, which the gun-rights group says it will conduct free of charge for any guardsman who wants to carry a concealed handgun.