Riot police officers shield off stones thrown by students, South Africa. 防暴警察擋下學生投擲的石塊

Riot police officers shield off stones thrown by students during their protest against university tuition hikes outside the union building in Pretoria, South Africa, Friday, Oct. 23, 2015. Thousands of South African university students protesting planned tuition hikes flocked to the country's main government complex on Friday, with some setting tires on fire and throwing stones as police responded with stun grenades and a water cannon. (AP Photo/Themba Hadebe)
Photos of the day - October 23, 2015
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Police duck bricks thrown during a protest by students over planned increases in tuition fees at the Union Buildings in Pretoria, October 23, 2015. (REUTERS/Sydney Seshibedi)
Photos of the day - October 23, 2015
http://news.yahoo.com/photos/photos-of-the-day-october-23-2015-1445615746-slideshow/police-duck-bricks-thrown-during-protest-students-over-photo-152920184.html