Ahmadinejad, left, meeting Medvedev on the sidelines of a SCO summit in Astana, Kazakhstan, on Wednesday. ASTANA, Kazakhstan — Russia won the backing of China and other members of a regional security body in criticizing U.S. plans for a missile shield, saying Wednesday that it could undermine global security. The Shanghai Cooperation Organization, a security bloc grouping Russia, China and four Central Asian states, signed […]