  We demonstrate that the energy spectra of Ultra High Energy Cosmic rays
(UHECR) as observed by AGASA, Fly's Eye, HiRes and Yakutsk detectors, have the
imprints of UHE proton interaction with the CMB radiation in the form of the
dip at $E\sim 1\times 10^{19}$~ eV, of the beginning of the GZK cutoff, and of
very good agreement with calculated spectrum shape. We argue that these data,
combined with small-angle clustering and correlation with AGN (BL Lacs), point
to the AGN model of UHECR origin at energies $E \lsim 1\times 10^{20}$ eV. The
excess of the events at $E \gsim 1\times 10^{20}$ eV, which is observed by
AGASA (but absent in HiRes data) can be explained by another component of
UHECR, e.g. by UHECR from superheavy dark matter.
