The area was peaceful, the weather clear, and the two white helicopters flying toward Zagreb prominently displayed the insignia of the European Community's monitoring mission. Nevertheless, a Yugoslav army MiG-21 fighter fired four air-to-air missiles, scoring a direct hit on one chopper, killing all five observers -- four Italian and one French -- on board.
The victims' coffins, draped with E.C. flags during a memorial service in Zagreb's cathedral the next evening, were a bleak reminder that peace will not come easily to Yugoslavia after six months of civil war. The federal military was quick to refer to "an unwanted and...