Estimate of B(anti-B ---> X(s) gamma) at O(alpha(s)**2)

Combining our results for various O(αs2) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the branching ratio at the next-to-next-to-leading order in QCD. We find B(B̅ →Xsγ)=(3.15±0.23)×10-4 for Eγ>1.6  GeV in the B̅ -meson rest frame. The four types of uncertainties: nonperturbative (5%), parametric (3%), higher-order (3%), and mc-interpolation ambiguity (3%) have been added in quadrature to obtain the total error.