Some theoretical and experimental aspects of particle production from the
strong equivalent photon fluxes present at high energy hadron colliders
will be reviewed. The emphasis will be on how photons at hadron colliders
can improve what we have learnt from experiments with lepton beams.
Experiments during the last 5-10 years have shown the feasibility of
studying photoproduction in proton-proton and heavy-ion collisions. The
experimental and theoretical development has revealed new opportunities as
well as challenges.