Arab chiefs of staff concluded the first of their two-day second meeting here today, presided over by Egypt's chief of staff Gen. Mahmoud Hijazi. The meeting was attended by Arab League Secretary General Dr. Nabil Al-Arabi and other Arab chiefs of staff or their representatives. Chief of General Staff of the Kingdom of Saudi Arabia Gen. Abdulrahman bin Saleh Al-Bunyan led his country's delegation to the meeting. During the meeting, the Arab chiefs of staff reviewed a study on how to establish an Arab joint force to preserve Arab national security before July 29 as was proposed by General Hijazi in the opening session.