Mission: Uncertain. (cover story)

Reports on Operation Allied Force, the North Atlantic Treaty Organization (NATO) assault on Yugoslav armed forces on March 24, 1999. United States support for President Bill Clinton's decision to initiate the effort to stop the Serbian offensive against ethnic Albanians in the province of Kosovo; Details of the assault, including the loss of an F-117 fighter and rescue of the pilot; Escalation of attacks on the Albanians in the face of the NATO assault; Outlook.