Pope Benedict XVI stands on a podium as he greets Shi'ite Mufti Sheikh Abdel Amir Qabalan (3rd L) as Druze Highest Sheikh al-Aql Naim Hassan(R) waits for his turn during a welcoming ceremony at Beirut international airport, September 14, 2012. Pope Benedict arriving in Lebanon on Friday for a three-day visit as civil war rages in neighbouring Syria called for a halt to weapons imports to Syria which he said were a "grave sin". REUTERS/Mohamed Azakir (LEBANON - Tags: POLITICS RELIGION) 

Shi'ite House Speaker Nabih Berri (R) and Shi'ite Mufti Sheikh Abdel Amir Qabalan attend a rally organised by members of the Amal movement to mark the 31st anniversary of the disappearance of Imam Musa Sadr, who was the founder and leader of the Amal movement in Lebanon, in Beirut's suburbs August 31, 2009. REUTERS/Sharif Karim (LEBANON POLITICS CONFLICT) 

Lebanese Shi'ite Mufti Sheikh Abdul Ameer Qabalan (L) and Iraqi Sunni Sheikh Ahmed Qubaesi attend the opening ceremony of an international conference on moderate Islam in Amman April 24, 2006. Clergymen from all over the world gathered in Amman on Monday calling for modern Islamic preaching to address timely challenges facing Islam and the world. REUTERS/Ali Jarekji