  Deceleration of relativistic jets from active galactic nuclei (AGNs) detected
recently by MOJAVE team is discussed in connection with the interaction of the
jet material with the external photon field. Appropriate energy density of the
isotropic photon field which is necessary to decelerate jets is determined. It
is shown that the disturbances of the electric potential and magnetic surfaces
play important role in general dynamics of particle deceleration.
