Prince Khalifa bin Salman Al Khalifa, Bahraini Prime Minister, met here today with Prince Turki Al-Faisal, Chairman of the Board of Directors of King Faisal Center for Research and Islamic Studies, and Prince Naif bin Ahmed bin Abdulaziz during their participation in the regional conference on "National and Regional Security of the Gulf Cooperation Council (GCC) Member States". During the meeting, the Bahraini Prime Minister hailed the Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud's initiative for transition of GCC Member States from the phase of cooperation to the phase of union. Prince Khalifa bin Salman Al Khalifa stressed the importance of research and studies concerning regional and international issues.