President Asif Ali Zardari has said that Iran, Afghanistan and Pakistan should boost their cooperation to tackle the regional security issues, repot said. If there were more cooperation among the three neighboring countries the regional situation would be better, he observed, adding that the three countries should not waste this golden opportunity to enhance their coordination. The president was addressing the inaugural session of tripartite summit began here Sunday at Iranian capital with the leaders of the three countries vowing to play a role of good neighbors for each other.