] A top adviser to U.S. Defense Secretary Donald Rumsfeld ] and one of the intellectual architects of the war with ] Iraq resigned his post Thursday amid an ethics ] controversy. ] ] Richard Perle resigned his chairmanship of the Defense ] Policy Board but is remaining a member of the board, ] according to the Pentagon. ] Perle, one of George W. Bush's foreign policy advisers ] during the 2000 presidential campaign, was hired last ] week by the bankrupt Global Crossing telecommunications ] company to help it restructure a deal to sell a majority ] holding in the company to Hutchison Telecommunications ] and government-run Singapore Technologies Telemedia. The ] United States government -- particularly the Defense ] Department and the FBI -- has national security concerns ] about the deal, according to The New York Times. It would ] put Global Crossing's fiber optics network -- which the ] military uses -- under Chinese ownership. Richard Perle resigns from DPB chair |