(30 Aug 1997) Eng/Serbo-Croat/Nat The U-S Bosnian envoy Robert Gelbard met President Biljana Plavsic at her headquarters in Banja Luka on Saturday as part of his tour of Bosnia meeting with key political figures. Earlier in the day Gelbard held talks with Momcilo Krajisnik, a top aide to indicted war criminal Radovan Karadzic, in the Bosnian Serb mountain stronghold of Pale. At the meeting with Krajisnik, Gelbard warned him that his behaviour had to change "or the consequences will be the most