Student leaders vow to step up Hong Kong's huge pro-democracy protests -- including a possible occupation of government offices -- unless the city's leader steps down within a day, as support for the movement grows around the world. Duration: 01:23
Student leaders vow to step up Hong Kong's huge pro-democracy protests -- including a possible occupation of government offices -- unless the city's leader steps down within a day, as support for the movement grows around the world. Duration: 01:23