UNITED NATIONS - Secretary-General Kofi Annan (news - web sites)'s new chief of staff heads to Washington on Wednesday to meet with critics and supporters of the United Nations (news - web sites) following a critical report of U.N. actions in the oil-for-food program in Iraq (news - web sites). Mark Malloch Brown's high-profile trip is aimed at informing U.S. lawmakers about ongoing U.N. management and administrative reforms and appears to be the opening salvo in a new offensive by Annan to present the world body in a more positive light. One of the U.S. lawmakers Malloch Brown is scheduled...