A South Carolina Republican congressman is not backing down from critics after he pulled out his own personal — and loaded — .38-caliber Smith & Wesson handgun during a meeting with constituents Friday. U.S. Rep. Ralph Norman, R-Rock Hill, told The Post and Courier he pulled out the weapon and placed it on a table for several minutes in attempt to make a point that guns are only dangerous in the hands of criminals. "I'm not going to be a Gabby Giffords," Norman said afterward, referring to the former Arizona Democratic congresswoman who was shot outside a Tucson-area grocery store...