The general health service is complemented by other agencies which provide health services for their staff (e.g. the military agencies) or segments of the general population (e.g. the Royal Commission for Jubail and Yanbu). There is an active Red Crescent Society in the Kingdom, which provides medical emergency services and plays a key role in providing medical assistance during the period of the annual pilgrimage, the Hajj. In his primary role as Custodian of the Two Holy Mosques, King Fahd takes a very direct interest in ensuring that healthcare provision during the Hajj meets the highest standards. The Kingdom’s universities are also involved in healthcare, not only by providing primary and specialized healthcare for their own staff and students, but through research, training and the implementation of health education programs.