Israel's police chief has vowed that Jewish extremists will not be allowed to spoil the upcoming visit of Pope Francis by vandalising Christian holy places. Speaking to reporters in Jerusalem on Sunday, Police Commissioner Yohanan Danino said a group of "extreme elements" were attempting "to create pressure and the impression of pressure" ahead of the pontiff's visit, which begins on May 25. Although police have made scores of arrests, there have been no successful prosecutions, prompting widespread expressions of concern from Christian leaders."We will do everything to ensure they won't ha