  The nature of electroweak symmetry breaking can only be established
definitively by the direct discovery and detailed study of the symmetry
breaking quanta at high energy colliders. At the LHC the ability to observe TeV
scale strong WW scattering confers a no-lose capability to establish the mass
scale and interaction strength of the symmetry breaking quanta, even if the
symmetry breaking quanta resist discovery and whether strong WW scattering is
observed or excluded. This lecture discusses the motivation to consider strong
WW scattering in light of what we have learned from precision electroweak data
during the decade. The theoretical basis for strong WW scattering is explained
with an introductory review of the Higgs mechanism from a general perspective
that encompasses light, perturbative Higgs bosons or nonperturbative, dynamical
symmetry breaking by TeV scale strong interactions. The experimental signals
and backgrounds are reviewed and the sensitivity of experiments at the LHC is
assessed.
