  Key issues in pomeron physics include whether the hard and soft pomerons are
distinct objects, and whether the hard pomeron is already present in amplitudes
at $Q^2=0$. It is urgent to learn how to combine perturbative and
nonperturbative concepts, and to construct a sound theory of perturbative
evolution at small $x$. Other questions are whether screening corrections are
small, and gap survival probabilities large. Finally, do diffractive processes
present a good way to discover the Higgs?
