var vtn_player_type = "vp";var ven_video_key="NTUzODM0fHwxNDcxfHwwfHx8fHx8";var ven_width="660";var ven_height="409";Twenty-five years after the bloody Tiananmen crackdown, activists and observers still decry the lack of political reform in China. Duration: 03:24