  The author reviews a model for the emission of high energy cosmic rays,
gamma-rays and neutrinos from AGN (Active Galactic Nuclei) that he has proposed
since 1985. Further discussion of the knee energy phenomenon of the cosmic ray
energy spectrum requires the existence of a heavy particle with mass in the
knee energy range. A possible method of detecting such a particle in the Pierre
Auger Project is suggested. Also presented is a relation between the spectra of
neutrinos and gamma-rays emitted from AGN. This relation can be tested by high
energy neutrino detectors such as ICECUBE, the Mediterranean Sea Detector and
possibly by the Pierre Auger Project.
