Monday President Costis Stephanopoulos pays an official visit to Bulgaria. To Wednesday. Prime Minister Costas Karamanlis to speak at the symposium on «Investment and Business Prospects in Greece’s Post-Olympic Era,» held by the International Herald Tribune at the Athenaeum Inter-Continental Hotel. Revolutionary Popular Struggle (ELA) trial continues, with sentencing of four members expected. Interior Minister Prokopis Pavlopoulos chairs meeting of General Secretariat for Civil Defense aimed at improving coordination of personnel and materiel. US Embassy and consulates in Athens and Thessaloniki will be closed today in observance of Columbus Day. Foreign Minister Petros Molyviatis to attend EU foreign ministers’ meeting in Luxembourg. To tomorrow. Church of Greece Holy Synod honors Greek Olympic medalists. National Technical University of Athens (NTUA) holds conference on «Euro-Mediterranean Cooperation: European Policy and Funded Programs,» at the university’s premises. Tel. 210.772.3553. Olympic Airlines aircraft technicians (EPTAOA) stage two three-hour work stoppages, from 3 a.m. to 6 a.m. and from 7 p.m. to 10 p.m., protesting privatization of the OA technical section and demanding the immediate hiring of more staff. Tuesday Parliament to discuss government proposal for the formation of an investigative committee to probe defense procurements by the former government. NTUA holds seminar on the «Synthesis of Functional Nanoparticles in Flame Aerosol Reactors.» For information, log on to www.emp.gr. Thursday Protest rally will be held at 1 p.m in the main square of Trikala, in memory of the seven schoolchildren killed in the bus crash on the Maliakos Gulf stretch of the Athens-Thessaloniki highway on September 27. Olympic Airlines aircraft technicians (EPTAOA) stage a 24-hour strike opposing privatization of the OA technical section while demanding the immediate hiring of more staff. American-Hellenic Arts Center of Halandri and its chairman, US Ambassador Thomas Miller, hold a press conference at the center to present its goals and program. Friday European Commission President Jose Manuel Durao Barroso visits Cyprus as part of his tour of EU capitals. Panhellenic Educators Association for Environmental Education (PEEKPE) holds a conference on «Sustainable Development, Environmental Education, Local Societies,» to be held at the Aristotelis Hotel in Halkidiki. To Sunday. For further details, tel 210.995.9250. Saturday General Secretariat for Youth holds a conference on «Future Leaders Wanted,» at the Divani Palace Acropolis, 11.30 a.m. Call 210.666.4303 or 210.331.4714 for further details. Defunct Democratic Social Movement (DIKKI) holds a two-day congress. To Sunday.