Calling himself "a son of Germany," Pope Benedict prayed at the former Nazi death camp of Auschwitz on Sunday and asked why God was silent when 1.5 million victims, mostly Jews, died in this "valley of darkness." Ending a four-day pilgrimage to Poland, Benedict, 79, said humans could not fathom "this endless slaughter" but only seek reconciliation for those who suffered then and those who now "are suffering in new ways from the power of hatred." As on the rest of his trip, he walked in the footsteps of his Polish-born predecessor John Paul, who came to the camp in...