BEIJING (AP) â€" China is closing a dozen websites, penalizing two popular social media sites and detaining six people for circulating rumors of a coup that rattled Beijing in the midst of its worst high-level political crisis in years.The extensive clampdown, announced late Friday by state media, underscores the authoritarian government anxieties over a public that is wired to the Internet and eager to discuss political events despite censorship and threats of punishment.A Xinhua News Agency report said Beijing police questioned and admonished an unspecified number of Internet users and detained six people not further identified. Aside from...