  We derive cosmological parameters from the CBI measurements of the Cosmic
Microwave Background (CMB) angular power spectrum. Our results provide an
independent confirmation of the standard $\Omega_{\rm tot}=1$ $\Lambda$CDM
model within the adiabatic, inflationary paradigm. Above $\ell=2000$ the
observations show evidence of power in excess of that expected in the standard
models. We use hydrodynamical simulations to show how Sunyaev-Zeldovich Effect
(SZE) may account for the excess power for models with fluctuation amplitude
$\sigma_8\sim 1$ which is in the high end of the range allowed by the primary
CMB observations.
