2011 began with some bleak news for Muslim-Christian relations around the world.
Recent attacks against churches in Iraq, Nigeria and Egypt have killed dozens of Christian worshippers. Meanwhile, the Pakistani government is standing by the country's controversial blasphemy law which critics say threatens religious minorities.
How should political and religious leaders deal with these challenges to interfaith relations?

Egyptian Christians hold a blood-stained portrait of Jesus Christ as they protest on January 2, 2011 inside the Al-Qiddissine (The Saints) church in Alexandria, following a New Year's Eve car bomb attack on the Coptic church in the northern Egyptian city in which 21 people were killed. (Mohammed Abed/AFP/Getty Images)