  The axion solution to the strong CP problem requires an anomalous global U(1)
symmetry. We show that the existence of such a symmetry is a natural
consequence of an extra dimension in which a gauged U(1) is spontaneously
broken on one of two branes, leaving an accidental global symmetry on the other
brane. Depending on where the standard model matter lives, the resulting axion
can be either the DFSZ or hadronic type. Gaugino-mediated supersymmetry
breaking fits comfortably in our framework. In addition, we present a model in
which the supersymmetry-breaking and Peccei-Quinn breaking scales are naturally
of the same size.
