  We use HST broad band images, VLA and VLBI continuum data to study the three
dimensional orientation of jets relative to nuclear dust disks in 20 radio
galaxies. The comparison between the position angles of the jets with those of
the dust disks major axes shows a wide distribution, suggesting that they are
not aligned preferentially perpendicular to each other. We use a statistical
technique to determine the 3 dimensional distribution of angles between jets
and dust disks rotation axes. This analysis shows that the observations are
consistent with jets homogeneously distributed over a large region, extending
over polar caps of 55 degrees to 77 degrees, but seem to avoid lying close to
the plane of the dust disks. We argue that the lack of close alignment between
jets and dust disks axes is not likely to be caused by feeding the nucleus with
gas from mergers originated from random directions. We suggest that the
misalignment can be due by a warping mechanism in the accretion disk, like
self-irradiation instability or the Bardeen-Petterson effect, or that the
gravitational potential in the inner regions of the galaxy is misaligned with
respect to that of the dust disk.
