EDINBURGH, Scotland -- Scottish voters have resoundingly rejected independence, deciding to remain part of the United Kingdom after a historic referendum that shook the country to its core. The decision prevented the rupture of a 307-year union with England, bringing a huge sigh of relief to Britain's political establishment, including Prime Minister David Cameron, who faced calls for his resignation if Scotland had broken away. The vote on Thursday -- 55% against independence to 45% in favor -- saw an unprecedented turnout of just under 85%.a A majority of voters did not embrace Scottish First Minister Alex Salmond's impassioned plea to launch a new nation, choosing instead the security offered by remaining in the U.K.