  This document was prepared as part of the briefing material for the Workshop
of the CERN Council Strategy Group, held in DESY Zeuthen from 2nd to 6th May
2006. It gives an overview of the physics issues and of the technological
challenges that will shape the future of the field, and incorporates material
presented and discussed during the Symposium on the European Strategy for
Particle Physics, held in Orsay from 30th January to 2nd February 2006,
reflecting the various opinions of the European community as recorded in
written submissions to the Strategy Group and in the discussions at the
Symposium.
