Members of the clergy attend a mass led by Pope Benedict XVI (not seen) at the Garden of Gethsemane at the foot of the Mount of Olives in Jerusalem May 12, 2009, where it is believed Jesus had his final prayer before he was betrayed and arrested. Pope Benedict visited holy sites in Jerusalem at the heart of the Israeli-Palestinian conflict on Tuesday as part of a pilgrimage beset by Jewish disappointment over his remarks on the Holocaust. REUTERS/Yannis Behrakis (JERUSALEM RELIGION POLITICS)