(Manchester-WTNH) _ A chaotic scene at a Manchester auto parts shop Thursday night. Police say a man tried to thwart a theft by pulling out his gun, but he's now facing charges. It happened around 7:00 at the Pep Boys on Spencer Street in the K-Mart mall. Police say it started when someone went into the store to steal a generator. "Guys have been stealing generators from us off the shelves," Pep boys worker Dave Sciaudone said. "We knew who they were, what their license plate was because they've been hitting all our stores. And my boss saw him grab...