Rob Ford, the former mayor of Toronto who gained global notoriety for admitting to smoking crack cocaine while in office, died from cancer on Tuesday, his office said in a statement. The Toronto city councillor, 46, had been undergoing treatment for an aggressive form of cancer that had recurred despite surgery and several rounds of chemotherapy. During his tumultuous 2010-2014 tenure as mayor of Canada's most populous city, Ford admitted to smoking crack cocaine, buying illegal drugs and driving after drinking alcohol.