Many Serbians are now hearing the first detailed account of the atrocities committed by the government's security forces against ethnic Albanians in Kosovo. A documentary produced by two M-P-R journalists detailing the war crimes aired on an independent radio station in Belgrade yesterday. American Radioworks correspondents Stephen Smith and Michael Montgomery spent 10 months investigating a mass killing in an ethnic Albanian village called Cuske (CHOOSH-kuh). Their documentary already aired in the United States on National Public Radio, but the Serbian government had censored such reports. Yesterday, Serbians heard a translated version of the documentary, which includes testimony from Serb fighters and traces the chain of authority for the killings to senior generals under former President Slobodan Milosevic. Michael Montgomery co-produced the documentary. He is in Serbia on his way back to Kosovo. He says the airing of the documentary was an indication of how things have changed in Serbia.