  We consider the problem of factorization in B decays and illustrate the
calculation of nonfactorizable contributions employing the QCD light-cone sum
rule method. We present a more detailed calculation of the ``charming penguin''
contributions as a potential source of the substantial nonfactorizable O(1/m_b)
effects in the B -> pi pi decay. Although the predicted corrections are not
sizable, by calculating the CP asymmetry we illustrate how such corrections can
accumulate to a visible effect. In conclusion, nonfactorizable contributions in
nonleptonic B decays into charmonium are briefly discussed.
