Tear gas is a chemical weapon also known as "demonstration control agents" (DCAs). It's designed to disperse large crowds, typically in outdoor settings. Tear gas contains lachrymatory agents, ...

A class-action suit can proceed against Multnomah County, ex-Sheriff Mike Reese and two former corrections supervisors alleging they failed to protect prisoners from tear gas that seeped into the ...

Kathmandu, Sept. 14 -- year-old Santosh Rawal was shot at around 12:45 during Monday's protests in front of Parliament, he thought the sting in his thigh was just a tear gas shell fragment. Only when ...

The repeated use of tear gas by federal immigration officers in Chicago has renewed a debate about how chemical irritants should be used by law enforcement personnel. By Mitch Smith Federal agents ...

The agents were from Border Patrol under Customs and Border Protection, a separate agency from ICE. Both are immigration enforcement agencies under the Department of Homeland Security. What's ...

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Chicago might see less tear gas as Operation Midway Blitz diminishes. And, when it is used, it might be less effective in colder, wetter weather. But wind adds a factor of unpredictability for a ...