  We present a new method for measuring the CP phase \alpha. It requires the
measurement of the pure penguin decays Bd(t) -> K(*) Kbar(*) and B_s -> K(*)
Kbar(*). The method is quite clean: we estimate the theoretical uncertainty to
be at most 5%. By applying the method to several K(*) Kbar(*) final states,
\alpha can be extracted with a fourfold ambiguity. An additional assumption
reduces this ambiguity to twofold: {\alpha, \alpha + \pi}. Since no \pi0
detection is needed, this method can be used at hadron colliders.
