  The polarization of core-collapse supernovae shows that many if not all of
these explosions must be strongly bi-polar. The most obvious way to produce
this axial symmetry is by the imposition of a jet as an intrinsic part of the
explosion process. These jets could arise by MHD processes in the formation of
pulsars and be especially strong in the case of magnetars. The jets will blow
iron-peak material out along the axes and other elements from the progenitor
along the equator, a very different composition structure than pictured in
simple spherical "onion skin" models. In extreme cases, these processes could
lead to the production of gamma-ray bursts powered by strong Poynting flux.
