  This is the write-up of a talk given at the EW session in Moriond (March
2012). I summarize some non-standard electroweak scenarios, and how they
predict the existence of new spin-two resonances. Spin-two resonances, whether
coming from the compactification of extra-dimensions or from a new sector of
strong interactions, exhibit the same interactions with the Standard Model.
This is a consequence of Lorentz and CP invariance, which we assume would be
preserved by the new strong sector. Although this would seem to support the
holographic duality between strongly interacting theories in four-dimensions
and extra-dimensional theories, I show that there is a way to distinguish
between the two sides of the "duality", which constitutes an explicit example
of its breakdown.
