OSI TAPE NO. 43 excerpt, It's peaceful in Plitvice, but tensions are growing in Slavonija and the Knin region. - Yugoslav Presidency hold emergency meeting (Stipe Mesic and Janez Drnovsek did not participate). - Franjo Tudjman speaks to three-member Presidency delegation. - First Croatian Youth World Congress; Tudjman's speech at the Congress. - Barricades in front of Vukovar (2 people wounded). - Alija Izetbegovic and S. Kljuic statements regarding Plitvice.