  We use dimensional regularization to compute the one loop quantum
gravitational contribution to the vacuum polarization on flat space background.
Adding the appropriate BPHZ counterterm gives a fully renormalized result which
we employ to quantum correct Maxwell's equations. These equations are solved to
show that dynamical photons are unchanged, provided the free state wave
functional is appropriately corrected. The response to the instantaneous
appearance of a point dipole reveals a perturbative version of the
long-conjectured, "smearing of the light-cone". There is no change in the far
radiation field produced by an alternating dipole. However, the correction to
the static electric field of a point charge shows strengthening at short
distances, in contrast to expectations based on the renormalization group. We
check for gauge dependence by working out the vacuum polarization in a general
3-parameter family of covariant gauges.
