WASHINGTON (AP) - Warren Zimmerman, the last U.S. ambassador to Yugoslavia, died Tuesday of pancreatic cancer. He was 69. Zimmerman, a career Foreign Service officer, was named ambassador to Yugoslavia in 1989 by the first President Bush. At the time, the former communist country was breaking up into warring factions, and Zimmerman led the administration's efforts to keep the state together. Bush recalled Zimmerman in 1992 to protest the outbreak of civil war. The war lasted until 1995 and pitted the country's Muslims, Orthodox Christian Serbs and Catholic Croats against each other. The war killed 260,000 and forced 1.8 million...