|Miracles, expensive cars, exorcisms and bodyguards are all part of the extraordinary world of Nigeria's millionaire preachers. In this Unreported World special we meet the preachers and churches changing the face of Christianity in Africa.
Dr Sign Fireman claims to have God-given powers to heal the sick, and raise people from the dead. Thousands turn out for his rock-concert-like services, giving 10% of their income in a tithe to 'receive God's blessings'.
Dr Fireman has become rich on the proceeds with flashy cars, bodyguards and luxury homes, but his 'prosperity preaching' model is not new: Pastor Chris Okotie is the fifth richest pastor in the country. His House of God church attracts Nigerian film stars, celebrities and musicians, and he's used his power base to run for the last three presidential elections.