notre dame cathedral will not have christmas mass. melissa bell is live for us in paris. you know the images of notre dame, burning, so memorable from april. walk us through the reconstruction efforts. and when you're hearing from officials when the reconstruction will end. >> reporter: in the wake of that fire, the world looked on aghast as the flames engulfed the cathedral. the french president said they planned to rebuild in five years. no christmas eve mass here, for the first time since the wake of the french revolution, where notre dame was turned into a temple of reason. but since 1804, a mass has been held here.