Nigeria's 150 million people are almost evenly divided between Christians and Muslims. And for several decades, fighting has repeatedly flared between the two groups, killing an estimated 20,000 people. But two men, once sworn enemies, are now working to undo the hatred they once sowed.
An Irish activist and scholar who has dedicated much of his life to bringing peace to places like South Africa, the West Bank and Northern Ireland has convened a special meeting in Nigeria.
