A bear attack in Alberta's Banff National Park has left two people dead, Parks Canada announced late Saturday. Natalie Fay, external relations manager for Parks Canada's Banff field unit, said the agency received an alert from a GPS device originating from the Red Deer River Valley at approximately 8 p.m. on Friday, indicating a bear attack. In a statement, Fay said a team specially trained in wildlife attacks was immediately mobilized, but weather hindered their response time. "Weather conditio