ATHENS, Greece (CNN) -- Egypt's Patriarch of Alexandria, a top leader of the Greek Orthodox church, is among 17 people killed in a helicopter crash off northern Greece. The military aircraft, which was carrying a delegation of religious officials, crashed into the Aegean Sea on Saturday, according to a Greek Defense Ministry official. Seven bodies have been recovered and rescuers are searching for the other 10 people who were aboard the helicopter. Patriarch Petros of Alexandria, the head of the 300,000 Christian Orthodox congregation in Africa, was on the flight with 11 other church officials and five crew members, Lt....