Human rights groups fear the worst for the dissident journalist detained while traveling on a Ryanair flight after another Belarusian activist, Witold Ashurok, died in custody, suggesting abuse. CNN’s Nick Paton Walsh reports.Human rights groups fear the worst for the dissident journalist detained while traveling on a Ryanair flight after another Belarusian activist, Witold Ashurok, died in custody, suggesting abuse. CNN’s Nick Paton Walsh reports.