Jailed Hong Kong dissident Joshua Wong was handed an additional 10-month sentence on Thursday after he pleaded guilty to taking part in an "unlawful" Tiananmen Square protest last year. Wong was sentenced alongside three other prominent young activists -- Lester Shum, Tiffany Yuen and Janelle Leung -- over the 4 June vigil, which was banned by police for the first time last year. yan/jta/jah