  We show that the natural symplectic structure on the Milnor fiber of an
isolated singularity in complex three variables whose link fibers over the
circle can be modified into one which is cylindrical at the end. As a
consequence we see that the foliation of codimension one on S^5 which is
adapted to the Milnor open book of S^5 associated with such a singularity
admits a leafwise symplectic structure. The modification also enables us to
construct certain closed symplectic 4-manifolds.
