  Secondary anisotropies of the CMB have the potential to reveal intricate
details about the history of our universe between the present and recombination
epochs. However, because the CMB we observe is the projected sum of a multitude
of effects, the interpretation of small scale anisotropies by future high
resolution experiments will be marred by uncertainty and speculation without
the handles provided by other observations. In this paper we show that cross
correlating the CMB with an overlapping weak lensing survey will isolate the
elusive kinetic Sunyaev-Zel'dovich Effect from secondary anisotropies generated
at higher redshifts. We show that if upcoming high angular resolution CMB
experiments, like PLANCK/ACT/SPT, cover the same area of sky as current and
future weak lensing surveys, like CFTHLS/SNAP/LSST, the cross correlation of
cosmic shear with the kSZ effect will be detected with high signal to noise
ratio, increasing the potential science accessible to both sets of surveys. For
example, if ACT and a CFHTLS like survey were to overlap this cross-correlation
would be detected with a total signal to noise ratio greater than 220, reaching
1.8 per individual multipole around l \sim 5000. Furthermore, this
cross-correlation probes the three point coupling between the underlying dark
matter and the "momentum" of the ionized baryons in the densest regions of the
universe at intermediate redshifts. Similar to the tSZ power spectrum, its
strength is extremely sensitive to the power spectrum normalization parameter,
\sigma_8, scaling roughly as \sigma_8^7. It provides an effective mechanism to
isolate any component of anisotropy due to patchy reionization and rule out
primordial small scale anisotropy.
