Cracking down on dissent: National security law trial begins in Hong Kong

They’ve come to be known as the Hong Kong 47. A group of prominent activists, former lawmakers and student leaders went on trial this week, accused of trying to topple the pro-Beijing government. Most of them, including Benny Tai and Joshua Wong, have been detained since their arrests two years ago. They have pleaded guilty in pre-trial proceedings to avoid long prison sentences that could carry up to life in jail. We take a closer look.