REFUSES TO PROCESS TRANSACTIONS . . . Citi Merchant Services and First Data Corp. are refusing to process any credit card transactions between federally licensed firearms retailers, distributors and manufacturers -- a move which will severely limit available inventory of firearms and ammunition to military, law enforcement and law-abiding Americans. The first company to be affected by this decision appears to be firearms distributor CDNN Sports Inc."We were contacted recently by First Data/Citi Merchant Services by a June Rivera-Mantilla stating that we were terminated and funds were being seized for selling firearms in a non-face-to-face transaction," said Charlie Crawford, president...