In this image taken Tuesday Dec. 15, 2009 Archbishop Paul Hinder, top Roman Catholic cleric walks out of his residence at the Christian compound next to a mosque in Abu Dhabi, United Arab Emirates. As the top Roman Catholic cleric in the heart of the Muslim world, Hinder walks a thin line between meeting the demands of a diverse Christians community spread across six countries on the Arabian Peninsula and abiding by strict rules of their Muslim hosts that with the exception of Saudi Arabia allow Christian worship, as long as no symbols of faith, such as a cross, are displayed. (AP Photo/Kamran Jebreili)AP - The Vatican's top cleric in the heart of Muslim Arabia tends to a flock of 2 million Christians spread around six desert nations. But he has to do it quietly: Most of them must still pray in secret and are forbidden to display crosses and other symbols of their faith.