  Arkani-Hamed, Dimopoulos and Dvali have recently proposed that gravity may
become strong at energies near 1 TeV thus removing the hierarchy problem. This
scenario can be tested in several ways at present and future colliders. In this
paper we examine the exchange of towers of Kaluza-Klein gravitons and their
influence on the production of pairs of massive gauge bosons in $\gamma \gamma$
collisions. These tower exchanges are shown to lead to a new dimension-8
operator that can significant alter the Standard Model expectations for these
processes. The role of polarization for both the initial state photons and the
final state gauge bosons in improving sensitivity to graviton exchange is
emphasized. We find that the discovery reach for graviton tower exchange in the
$\gamma \gamma \to W^+W^-$ channel to be significantly greater than for any
other process so far examined.
