U.S. struggles on China-war planning - top officer Wed Jun 29, 2005 03:18 PM ET WASHINGTON (Reuters) - The Defense Department is struggling to determine the right mix of bombers and other warplanes to fight China if it ever became necessary, President Bush's choice to become the next Air Force chief of staff said on Wednesday. Lining up such firepower would top his list of priorities if confirmed as the Air Force's top military officer, Gen. Michael Moseley said at his confirmation hearing before the Senate Armed Services Committee. Moseley said the right mix of long-range strike capabilities was "certainly...