Does any one know if Einstein equation predicts the existence of particle jets fired by massive black holes observed by NASA from active galaxies? If yes, what would be the predicted relation between the black hole mass and rotation speed to the flux of matter ejected, how long these jets continue to fire particles and what is the total mass ejected by the jets? Is the total mass bigger or smaller than the matter that falls in to the black hole? If not, what is missing in Einstein equation? Thanks, Rami.