China will likely have more than 1,000 operational nuclear warheads by 2030 as the country rapidly modernizes and diversifies its military capabilities, the U.S. Defense Department said Thursday.In an annual report on China's military power, the department estimated that the number was already above 500 in May, noting that the pace is on track to exceed earlier projections.A senior U.S. defense official said the acceleration "raises a lot of concerns" and that the United States wants China to be more transparent about its nuclear buildup and to show greater willingness to discuss risk reduc…READ FULL ARTICLE