  A sketch of the proof of strong cosmic censorship is presented for a class of
solutions of the Einstein-Maxwell equations, those with polarized Gowdy
symmetry. A key element of the argument is the observation that by means of a
suitable choice of variables the central equations in this problem can be
written in a form where they are identical to the central equations for general
(i.e. non-polarized) vacuum Gowdy spacetimes. Using this it is seen that the
results of Ringstr\"{o}m on strong cosmic censorship in the vacuum case have
implications for the Einstein-Maxwell case. Working out the geometrical meaning
of these analytical results leads to the main conclusion.
