hague u.n. war crimes court prosecute atrocities commit breakup yugoslavia 1990s put former serbian president slobodan milosevic trial close doors thursday two decades today common u.n. security council call perpetrators bad crimes hold responsible .... accountability take root collective conscience say u.n. secretary general ant nio guterres court legacy ceremony hague international criminal tribunal former yugoslavia set 1993 balkan war still rag think stand much chance success go international co-operation capture try every one 161 suspect indict die first first serious attempt hold war criminals responsible action since nuremberg trials world war two idea international court special tribunals set try war crimes conflict become commonplace icty begin fade popular consciousness outside balkans conviction last month bosnian serb gen. ratko mladic genocide massacre thousands unarm men boys srebrenica bosnia 1995. days late bosnian croat general slobodan praljak commit suicide courtroom drink cyanide potion moments conviction 20-year sentence uphold low come 2006 milosevic whose trial drag years die heart attack cell 2006 verdict reach case victims attend close ceremony notably munira subasic represent mother srebrenica group lobby justice 8,000 boys men massacre serb force srebrenica 1995. prominent figure include bosnian serb military leader radovan karadzic convict 2016 sentence 40 years ratko mladic convict last month sentence life appeal convictions court architects hop establish happen war punish bad offenders would help reconcile serbs croats bosnian muslims however prosecutor serge brammertz say court bring justice bring communities together throughout region war criminals see heroes victims ignore say bittersweet close ceremony alfons orie preside judge mladic case perform part handel oratio solomon sing part solomon u.n. war crimes court prosecute milosevic close doors