With chants and ululations, Iraqi Christians celebrated the inauguration of a recently-restored Chaldean Catholic Church in Mosul on Friday, years after jihadists turned it into a religious police office.Around 300 faithful attended the first mass in the 80-year-old church of Um al-Mauna -- "Our Lady of Perpetual Help" after it was fully renovated. They prayed and took photos on mobile phones."I've been waiting for this day," 74-year-old former school director Ilham Abdullah said.