The aim of these studies is to use hard (large Q^2) processes to
investigate the partonic nature of the pomeron.  We have measured events with
large rapidity gaps between balancing high E_T jets, events with two forward
(same-side) jets and a large gap (diffractive di-jet production), diffractive
W^+/- production and diffractive heavy flavor (J/psi and b-quark) production.
Candidate events of the type double-pomeron -> di-jet are observed.  I close
with a look at the future (Run II).