WASHINGTON WATCH Cool breezes greet China's designated new leader By James Borton Unusually strong spring winds scattered cherry blossoms across Pennsylvania Avenue as Chinese Vice President Hu Jintao was ushered into the West Wing at the White House last week. Some Sino tea-leaf readers and foreign policy pundits were left wondering whether these strong blasts of air blowing through Washington are a sign of things to come. Hu's visit was largely viewed as an opportunity for the US policy shapers to better assess anticipated changes in the US-Sino relationship expected in the fall after the 16th Communist Party Congress convenes....