CNN revisits church where massacre occurred ahead of Pope's visit

Ahead of Pope Francis' historic visit to Iraq, CNN's Ben Wedeman visits Baghdad's Our Lady of Salvation Church, the site of the worst single massacre of Iraqi Christians ever. On October 31 2010, terrorists from the Islamic State in Iraq burst in and a four-hour siege ensued, after which 58 bodies of worshippers, priests and security forces were recovered. CNN's Ben Wedeman reports.