ISLAMABAD — An American woman, her Canadian husband and their three young children have been released after years of being held captive by a network with ties to the Taliban, U.S. and Pakistani officials said Thursday. U.S. officials say Pakistan secured the release of Caitlan Coleman of Stewartstown, Pennsylvania, and her husband, Canadian Joshua Boyle, who were abducted five years ago while traveling in Afghanistan and had been held by the Haqqani network in Pakistan. Coleman was pregnant when she was captured.