UNITED NATIONS — United Nations officials apparently knew of specific allegations that bribes were being paid in the oil-for-food program but there's no sign they did anything to change the program, documents obtained by FOX News show. Nearly two years ago, U.N. official Benon Sevan (search) — the man who ran the oil-for-food program — received a copy of a letter from Lakia (search), a Russian-owned oil company, that was sent to Iraqi authorities. The Oct. 2, 2002, letter was blunt and direct. It accused the State Oil Marketing Organization (search) of "lying to us." "It is necessary for us...