TEHRAN, Sept. 5--Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei on Tuesday emphasized the need for Muslim states to use all capacities to help improve standards of living of their people. The leader made the remark in a meeting with Djiboutian President Ismail Omar Guelleh, IRNA reported. “Iran attaches great importance to promotion of ties with Muslim states,“ he said. Ayatollah Khamenei added that colonial powers and warmongers have always prevented Muslim nations from using the opportunities for utilizing their capabilities. The leader also said that colonial powers escalate war and tension in the Middle East as one of...