Hundreds of students were involved and police in riot gear had to be called in.

NPR: Racial Tensions Overheat at L.A. High School

Soon after Tuesday's march ended, troops and riot police moved in to positions around Yangon.

ECONOMIST: Myanmar's protests

The riot of blooms in a nearby tulip poplar became a visual touchstone for my stay.

FORBES: Weekend in the Country

Last year, the Shenzhen-based Tencent bought small video game maker Riot Games of Los Angeles.

FORBES: China's Tencent Buys Stake In U.S. Epic Games

Three weeks later another riot erupted, this time in the neighbouring province of Yunnan.

ECONOMIST: China before the Olympics

The president shocked his Western allies by ordering riot police to break up the protest.

NPR: Calm Urged in Georgia After Disputed Election

He frequently hints that thousands of his loyal supporters will riot if he is removed.

ECONOMIST: Indonesia

The troops responded with tear gas and other riot dispersal means, the military said.

NPR: Israeli Planes Strike Gaza After Rocket Fire

His victory sparked angry protests in the capital, Honiara, and the deployment of riot police.

ECONOMIST: Ping-pong politics roil three island nations