The Shanghai Cooperation Organization (SCO) will soon host its annual summit in Astana, Kazakhstan, and the group's big struggle this year will be to redefine its purpose. In recent years, the organization has evolved from little more than a talk shop for its six members into a forum for active security and economic coordination. But at the upcoming summit, to be held on June 8-9, the SCO will be welcoming two more nations into its ranks: India and Pakistan. Though the new additions will open up more opportunities for cooperation, they will also muddy the organization's focus as its members continue to bring different agendas to the table. ...