FILE - In this July 26, 2020, file photo, federal officers launch tear gas at demonstrators during a Black Lives Matter protest at the Mark O. Hatfield U.S. Courthouse in Portland, Ore. The Associated Press found that there is no government oversight of the manufacture and use of tear gas. Instead, the industry is left to regulate itself. (AP Photo/Marcio Jose Sanchez, File)FILE - In this July 26, 2020, file photo, a federal officer holds a tear gas rifle during a Black Lives Matter protest at the Mark O. Hatfield U.S. Courthouse in Portland, Ore. The Associated Press found that there is no government oversight of the manufacture and use of tear gas. Instead, the industry is left to regulate itself. (AP Photo/Marcio Jose Sanchez, File)FILE - In this July 29, 2020, file photo, a demonstrator kicks a tear gas canister back at federal officers during a Black Lives Matter protest at the Mark O. Hatfield U.S. Courthouse in Portland, Ore. Interviews by The Associated Press with medical researchers, federal regulatory agencies, and a review of U.S. government-funded scientific studies raise questions about the safety of the gas, especially its use on individuals in confined spaces, in excessive quantities, and when its fired directly at protesters. (AP Photo/Marcio Jose Sanchez, File)FILE - In this Nov. 30, 1999, file photo, Seattle police use tear gas to push back World Trade Organization protesters in downtown Seattle. The Associated Press found that there is no government oversight of the manufacture and use of tear gas. Instead, the industry is left to regulate itself. (AP Photo/Eric Draper, File)FILE - In this Aug. 27, 1968, file photo, a woman wears a gas mask as she walks with a companion holding a cloth to his eyes after they were sprayed with tear gas during protests on Chicago's North Side. The Associated Press found that there is no government oversight of the manufacture and use of tear gas. Instead, the industry is left to regulate itself. (AP Photo/File)In this July 11, 2020, photo provided by Brendan Deiz, Deiz is seen in Portland, Ore. In Portland, which has been an epicenter of Black Lives Matter protests, several people exposed to tear gas have reported severe reactions. Deiz, a 33-year-old teacher and musician, was at home in bed when Portland police fired tear gas several blocks away in the predawn hours of June 26, 2020. "All of a sudden I started choking and my eyes started watering, my throat started burning in the middle of the night, and I realized that I was smelling tear gas coming up through my window AC unit," Deiz said in a telephone interview. (Brendan Deiz via AP)Samira and Andrew Green, a married couple who were tear gassed at a recent demonstration, pose together at a park in Portland, Ore., on July 21, 2020. Samira Green was 22 weeks pregnant on June 2 when she and her husband were tear gassed at a Black Lives Matter protest that had been peaceful. (AP Photo/Gillian Flaccus)Samira and Andrew Green, a married couple who were tear gassed at a recent demonstration, walk together at a park in Portland, Ore., on July 21, 2020. Samira Green was 22 weeks pregnant on June 2 when she and her husband were tear gassed at a Black Lives Matter protest that had been peaceful. (AP Photo/Gillian Flaccus)
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FILE - In this July 26, 2020, file photo, federal officers launch tear gas at demonstrators during a Black Lives Matter protest at the Mark O. Hatfield U.S. Courthouse in Portland, Ore. The Associated Press found that there is no government oversight of the manufacture and use of tear gas. Instead, the industry is left to regulate itself. (AP Photo/Marcio Jose Sanchez, File)
