CAIRO, Egypt - A confidential Treasury Department review of a United Arab Emirates firm's pending purchase of the British-based contractor that makes components for a tank used by the U.S. Army is expected to go to the White House as soon as this week, according to administration officials. The proposed $1.2 billion deal is almost identical to Dubai Ports World's takeover of the British firm that operated American ports from Miami to New York. But in this case, the proposed buyer, Dubai International Capital, would gain control of a British company, Doncasters Group Limited, that builds the specialized turbine fan...