At a most inopportune time, the Balkans are back. On Dec. 10, the U.S.-E.U.-Russian negotiating team tasked with getting the Serbs and Albanians to agree on Kosovo's future status will report to the United Nations that it has failed. A few weeks later Kosovo's government will proclaim that Kosovo is an independent nation -- a long overdue event. The United States and most of the European Union (led by Britain, France and Germany) will recognize Kosovo quickly. Russia and its allies will not. Kosovo's eight-year run as the biggest-ever U.N. project will end with great tension and a threat of...