  We present some results on the usefulness of upgraded Tevatron, LHC proton
proton collider and linear e+e- colliders in the TeV range to test the idea of
a strongly interacting sector as responsible for the electroweak symmetry
breaking. The calculations are performed within an effective lagrangian
description, called the BESS model, which provides for a rather general frame
based on the standing point of custodial symmetry and gauge invariance, without
specifying any dynamical scheme.
