• Canadian law professor Richard McLaren speaks at a news conference in Toronto, Monday, July 18, 2016, to present his findings into allegations of a state-backed doping conspiracy involving the 2014 Winter Olympics in Sochi, Russia. (Frank Gunn/The Canadian Press via AP)

    Russia’s participation in Rio uncertain after doping report

    A scathing report outlining a state-sanctioned doping system in Russia prompted immediate calls for the nation’s entire team to be sidelined from the Summer Games, raising the possibility that the Olympics could go on without a sports superpower for the first time since the 1980s.