Delaware, one of the smallest and least populated states in the United States, ranks as the most secretive jurisdiction in the world for financial transactions, a London-based advocacy group said Monday. The Tax Justice Network (TJN) said Delaware topped its list of the 60 countries and other legal jursidictions most vulnerable to abuse by tax evaders. Luxembourg, Switzerland, the Cayman Islands and the United Kingdom followed the U.S. state on the organization's Financial Secrecy Index, published on www.financialsecrecyindex.com. The organization dinged the United Kingdom as the fifth most secretive tax haven in the world because of "political and other links...