Police Raid Uncovers New York Knife Cache ............ ERIKA MARTINEZ Courtesy of The New York Post The owners and employees of five Queens shops were busted last night after police seized more than 350 illegal knives from their businesses. The sweep, called Operation Cutting Edge, began with undercover cops buying knives from the stores about two weeks ago, Deputy Chief James Hall said. Warrants were issued, and the stores were raided last night. "I think as firearms become more difficult to obtain, we are now starting to see a trend toward the use of knives," Hall said. "It's a trend...