When Jonathan Pring posted images on Facebook showing the moment he went from being a current gun owner to a former gun owner, he knew he’d get some response. What he didn’t expect was for the post to go viral. "I didn't wake up yesterday planning to become the local Phoenix poster child for the American gun debate,” Pring said. The pictures show Pring willingly handing over his firearms, which included a machine gun and a pistol, to a uniformed Phoenix police officer in the living room of his Phoenix home. Pring, who’s a dual citizen of the U.S. and...