STRASBOURG, France - Turkey's prime minister urged the West on Wednesday to make a concerted effort to lessen tensions with Muslim societies, saying more tolerance is needed to mend a deepening rift with the Islamic world. Prime Minister Recep Tayyip Erdogan said last year's angry protests over cartoons depicting the Prophet Muhammad reveal a need to discuss limits to free expression in some cases to keep extremists from exploiting growing polarization. "Islamophobia and xenophobia are gaining ground in the West. In the Muslim world, on the other hand, there is a widening perception that it is besieged and its values...