Claim: Police in the United States are allowed to use tear gas even though it "has been classified as a chemical weapon and banned in international conflict since 1993."
Fact-check: Tear gas was banned for warfare in 1993 but police still use it, viral meme says
Verdict: mostly-true
Organisation: PolitiFact
Author: Louis Jacobson
Date published: 2014-08-26T00:00:00