In April 1999, the Atlantic alliance will celebrate its 50th anniversary at a summit in Washington, D.C. This makes the North Atlantic Treaty Organization (NATO) one of the longest lasting alliances in history. Unlike other alliances, NATO has not only outlasted the conditions that brought it into being, it has also adopted a range of new missions and policies to ensure its key role in Euro-Atlantic security for years to come. NATO's crucial role in Bosnia, its new relations with countries across the Euro-Atlantic area, and its strategic partnership with Russia indicate that the Atlantic community remains as dynamic as ever. And, as the accession of three new NATO members testifies, this Atlantic community is growing.