The United Nations has begun investigating whether an airplane's flight data recorder - known as a "black box" - that has been sitting in a U.N. file cabinet for a decade may be the missing device from the plane crash that killed the presidents of Rwanda and Burundi, an act that triggered the Rwandan genocide in 1994. Secretary General Kofi Annan said the discovery of the black box was "a first-class foul up." Annan's spokesman, Fred Eckhard, said the black box is in the possession of the Peacekeeping Department's Air Safety Unit and that Annan had "instructed the Office of Internal Oversight Services to look into exactly what happened 10 years ago."