NEW YORK (AP) -- The New York City medical examiner's office, citing diplomatic protocol, will not release the cause and manner of death for Russia's ambassador to the United Nations, who died suddenly last month after collapsing in his office. An autopsy was performed on Ambassador Vitaly Churkin last month, but the death required further study. The additional tests were completed, but Julie Bolcer, spokeswoman for the city's medical examiner, said Friday that the city's law department told the office not to release any further information, "in order to comply with international law and protocol." The U.S. Department of State...